
680 N.W.2d 453 (2004)
260 Mich. App. 636
Terrance BURKHARDT, Plaintiff-Appellant,
v.
Michael L. BAILEY, Defendant-Appellee, and
Bond Corporation, Defendant, and
Ralph Hamilton, Sr. and Lona Hamilton, Intervening Defendants-Appellees.
Docket No. 243354.
Court of Appeals of Michigan.
Submitted February 3, 2004, at Grand Rapids.
Decided February 19, 2004, at 9:05 a.m.
Released for Publication May 14, 2004.
*455 Dreyer & Hovey (by David J. Dreyer), Harrison, for Terrance Burkhardt.
Bishop & Heintz, P.C. (by Douglas S. Bishop and Steven R. Fox), Traverse City, for Ralph Hamilton, Sr., and Lona Hamilton.
Before: MURRAY, P.J., and MURPHY and MARKEY, JJ.
*454 MARKEY, J.
Plaintiff, a tax purchaser of certain vacant property in Ogemaw County, appeals by right the trial court's order granting defendant Michael L. Bailey and intervening defendants Ralph Hamilton, Sr., and Lona Hamilton summary disposition under MCR 2.116(C)(10) on plaintiff's complaint to quiet title. The trial court also declared plaintiff's tax deed void and ordered the property redeemed and reconveyed to Bailey and the Hamiltons pursuant to the Hamiltons' tender of the statutory redemption amount.[1] We conclude that the trial court erred by applying principles of equity to overcome the plain language of the relevant document that discharged a mortgage held by defendant Bond Corporation, extinguishing its right of redemption. Therefore, we reverse and remand for entry of summary disposition for plaintiff.

I. Summary of material facts and proceedings
This is not the first time this case has been before this Court. In Burkhardt v. *456 Bailey, unpublished opinion per curiam of the Court of Appeals, issued September 21, 2001 (Docket No. 223706), 2001 WL 1134634, we affirmed in part and reversed in part the trial court's grant of summary disposition to Bailey and Bond. We repeat some of the historical facts set forth in our first opinion.
Bailey owned vacant property secured by a mortgage held by Bond Corporation. Bailey failed to pay property taxes and, in May 1997, Burkhardt purchased the property at a tax sale. On August 31, 1998, Burkhardt obtained a tax deed to the property. Burkhardt served Bailey with notice of reconveyance; however, Bailey took no steps to redeem the property within six months after receiving the notice. See M.C.L. § 211.73a; M.C.L. § 211.140(1).
On July 7, 1999, Burkhardt filed a complaint seeking to quiet title to the property, seeking to reform the mortgage, or in the alternative to have the mortgage declared satisfied. Bailey did not answer the complaint, and was defaulted. Bond Corporation moved for summary disposition pursuant to MCR 2.116(C)(8) and (10), arguing that Burkhardt's failure to provide it with the required notice rendered the tax deed void. The trial court granted summary disposition in favor of both Bond Corporation and Bailey, and declared Burkhardt's tax deed void.
We noted that under M.C.L. § 211.73a[2] plaintiff would be barred from asserting title if he failed to make a bona fide effort to serve the required notice of the tax sale and the right of reconveyance upon payment of the applicable redemption amount.[3] We continued:
After purchasing the property and obtaining a tax deed, Burkhardt served the required notice on Bailey but did not serve notice on Bond Corporation, notwithstanding the fact that the mortgagee named in an undischarged, recorded mortgage is entitled to notice. M.C.L. § 211.140(1)(d). At the time he filed the action to quiet title, approximately four years remained for Burkhardt to give the required notice to Bond Corporation. Burkhardt's action was in effect premature; however, he was not yet precluded from claiming ownership of the property under the tax deed because five years had not yet passed without notice being given to all parties entitled to receive notice.
Accordingly, this Court held that the trial court correctly granted Bond summary disposition but erred by declaring plaintiff's tax deed void. But added, "[i]f Burkhardt fails to serve the required notice on Bond Corporation within the specified five-year period, he will be barred from claiming title to the property under the tax deed." We also held that
the trial court erred by granting summary disposition in favor of Bailey. Bailey took no steps to redeem the property within six months of receiving the notice of redemption. He lost the opportunity to redeem the property when he did not act in a timely manner to do so, and was not entitled to rely on Bond Corporation's argument that it did not receive proper notice.
The trial court entered its first order in this matter on September 16, 1999. Later in 1999, while the appeal of that order was still pending,[4] the Hamiltons, through their daughter-in-law Shelley Hamilton, who *457 owned a mortgage company, paid the mortgage debt Bailey owed to Bond. The Hamiltons were aware of the pending appeal; Bailey is Lona Hamilton's brother. Lona and Ralph Hamilton (the Hamiltons) aver they asked Shelley Hamilton to help them assume Bond's position and rights as mortgagee. Bailey also averred that he believed the Hamiltons intended to "take over" Bond's position as primary mortgagee. To accomplish this, the Hamiltons loaned Bailey $25,000, of which $10,000 was used to pay Bailey's debt to Bond. On December 2, 1999, Bailey granted the Hamiltons a $25,000 mortgage on the subject property. The Hamiltons never engaged in any direct negotiations with Bond. Likewise, Bailey averred he had no contact with Bond regarding the payoff of his debt.
In an affidavit, Shelley Hamilton testified that the Hamiltons "intended to assume Bond's position as first mortgagee," and she believed that she structured the transaction to accomplish that intent. But she also averred that she conducted the transactions with Bond by mail. She further averred that it "was not until after I had received the new mortgage from Bailey to Hamilton [sic], and disbursed the funds to Bond Corporation, that I forwarded the new mortgage and the executed discharge of Bond's mortgage, together, for recording." (Emphasis added.) The discharge of Bailey's mortgage to Bond was recorded on January 14, 2000, and provides:

DISCHARGE OF MORTGAGE
KNOWN ALL MEN BY THESE PRESENTS, That Bond Corporation, a Michigan Corporation, whose address is 2007 Eastern, S.E., Grand Rapids, Michigan 49507 does hereby certify, That a certain Mortgage dated July 24, 1992, made and executed by Michael L. Bailey and Patty J. Bailey of the first part, to Bond Corporation of the second part, and recorded in the office of the Ogemaw County Register of Deeds in Liber 383 Page 443-448 on August 3, 1992 is fully paid, satisfied and discharged.
Dated this 15th day of November, 1999.
On September 21, 2001, this Court affirmed in part and reversed in part the trial court's first order in favor of defendants. In the trial court, on remand, plaintiff presented a proposed order setting aside the summary disposition order, reinstating the tax deed, dismissing Bond without prejudice, and issuing a judgment of quiet title against Bailey. The Hamiltons moved to intervene and objected to plaintiff's proposed order. After a December 14, 2001, hearing, the trial court declined to adopt plaintiff's proposed order and instead merely vacated the portions of its prior decision granting summary disposition to Bailey and finding the tax deed void. The trial court ordered that all other aspects of the earlier decision remained in effect.
Meanwhile, Ralph Hamilton requested and received from Bond an assignment of its rights and a quitclaim deed. Hamilton averred that these documents did not create new rights, "but only reflected my intent relative to the transaction." (Emphasis added.)
Bond's quitclaim deed, dated November 28, 2001, recites it is "[f]or full consideration of funds advanced by [the Hamiltons] to discharge [Bailey's] mortgage...." (Emphasis added.)
Bond's "assignment" to the Hamiltons, also dated November 28, 2001, provides, in pertinent part:
It is the intent of this document to assign and convey any and all interest of the Assignor, if any, in the described premises, including, but not limited to, any and all rights, if any, as Mortgagee, *458 under or through a certain Mortgage dated July 24, 1992, made and executed by Michael L. Bailey and Patty J. Bailey to Bond Corporation....
This assignment and conveyance is made, expressly, without warranty or representation on behalf of Bond Corporation as to the existence of any particular rights.

This assignment is made by Bond Corporation, a Michigan corporation, upon the request of Ralph Hamilton, Sr. and Lona Hamilton, and upon a representation of said persons that the funds paid to Bond Corporation to discharge the above-referenced mortgage were advanced by Ralph Hamilton, Sr. and Lona Hamilton, pursuant to their understanding that they were accepting and assuming its position as primary mortgagee for said premises. [Emphasis added.]
In January 2002, the trial court granted the Hamiltons' motion to intervene. In March 2002, the Hamiltons tendered a reconveyance payment of $2,493.51 to the register of deeds, which the trial court ordered held by the county treasurer. Later, the Hamiltons moved for summary disposition under MCR 2.116(C)(10). At a hearing on the motion on July 11, 2002, the trial court found that Bond's interest in the subject property had been conveyed to or assumed by the Hamiltons who had advanced "purchase money" to pay Bailey's debt to Bond. The trial court reasoned that plaintiff had never given Bond notice of the right to reconveyance; therefore, Bond could have redeemed the property for the benefit of itself and all other holders of interests in the property, including Bailey. In essence, Bond or Bond's successors in interest, the Hamiltons, could redeem the property because plaintiff had not given Bond statutory notice and, upon redemption, Bailey's contingent interest would be revived. The trial court relied heavily on the fact that Bond's mortgage discharge and the new mortgage from Bailey to the Hamiltons were recorded on the same day. Thus, the trial court viewed the payoff to Bond and the new mortgage as one transaction. Further, the trial court concluded that although it would have been better if the documents indicated Bond assigned its rights, to rule for plaintiff would give him a windfall and cut off the Hamiltons. The trial court believed that that result would be inequitable and elevate form over substance. Accordingly, the trial court granted Bailey and the Hamiltons summary disposition under MCR 2.116(C)(10).
The trial court entered its order on August 8, 2002, ruling that the Hamiltons, "as the legal and equitable assignees of Bond Corporation, as mortgagees, were and are entitled to a notice of reconveyance and the opportunity to redeem within the period permitted by statute." The Court further ordered that the county treasurer pay the redemption amount deposited by the Hamiltons to plaintiff upon compliance with all statutory requirements. The order also dismissed with prejudice plaintiff's complaint to quiet title.
Plaintiff moved for a stay pending appeal, but the trial court only granted an order staying payment of the redemption money to plaintiff. Plaintiff filed a notice of lis pendens to otherwise preserve his interest in the property.
We summarize the three issues plaintiff raises on appeal. First, has Bailey forever lost all interest in the property under the General Property Tax Act, M.C.L. § 211.1 et seq., or could Bailey's interest in the property be revived if redeemed by a proper party. Second, was Bond's right to notice of reconveyance, and, therefore, Bond's right to redeem, extinguished when its discharge of mortgage was recorded. *459 Third, did the Hamiltons succeed to Bond's right of redemption, and if not, could the trial court nevertheless grant the Hamiltons equitable relief.

II. Analysis

A. Standard of review
This Court reviews de novo a trial court's decision to grant summary disposition. Spiek v. Dep't of Transportation, 456 Mich. 331, 337, 572 N.W.2d 201 (1998). A party's claim to summary disposition based on MCR 2.116(C)(10) tests the factual sufficiency of the complaint and must be supported or opposed by affidavits, depositions, admissions, or other documentary evidence. Id.; Maiden v. Rozwood, 461 Mich. 109, 120-121, 597 N.W.2d 817 (1999). The trial court must consider the submitted evidence in the light most favorable to the nonmoving party. MCR 2.116(G)(5); Ritchie-Gamester v. City of Berkley, 461 Mich. 73, 76, 597 N.W.2d 517 (1999). Where the proffered evidence fails to establish that a disputed material issue of fact remains for trial, summary disposition is properly granted to the party so entitled as a matter of law. MCR 2.116(C)(10), (G)(4), and (I)(1), (2); Maiden, supra; Auto-Owners Ins. Co. v. Allied Adjusters & Appraisers, Inc., 238 Mich.App. 394, 397, 605 N.W.2d 685 (1999).
Likewise, both the interpretation of a statute and a contract are questions of law this Court reviews de novo. McKusick v. Travelers Indemnity Co., 246 Mich. App. 329, 332, 632 N.W.2d 525 (2001); Ottaco, Inc. v. Kalport Dev. Co., Inc., 239 Mich.App. 88, 92, 607 N.W.2d 403 (1999). Moreover, this Court reviews equitable actions de novo, including actions to quiet title. Little v. Kin, 249 Mich.App. 502, 507, 644 N.W.2d 375 (2002); Killips v. Mannisto, 244 Mich.App. 256, 258, 624 N.W.2d 224 (2001). The trial court's findings of fact are reviewed for clear error, MCR 2.613(C), but the court may not resolve factual disputes or determine credibility in ruling on a summary disposition motion, Skinner v. Square D Co., 445 Mich. 153, 161, 516 N.W.2d 475 (1994).

B. Bailey's rights
The county may sell real property against which taxes were assessed before January 1, 1999, but not paid.[5] M.C.L. § 211.60. An individual who obtains an interest in real property through a tax sale, however, must perfect his title by notifying all parties that have a recorded interest in the property or that assert an ownership interest through open possession that the property has been sold for unpaid taxes. M.C.L. § 211.140(1).[6] The notice must advise that the property may be reconveyed upon payment to the county treasurer of the redemption amount[7] within six months after return of service of the notice. Id. Because this six-month period is the final redemption period, the statutory notice requirements must be strictly complied with because the tax sale proceedings serve to divest owners of their property interests. Equivest Ltd. Partnership v. Foster, 253 Mich.App. 450, 453-454, 656 N.W.2d 369 (2002); Ottaco, supra *460 at 90-91, 607 N.W.2d 403. But the six-month period does not begin to run until notice is given. Equivest, supra at 454, 656 N.W.2d 369; Ottaco, supra at 91, 607 N.W.2d 403. The tax purchaser's right to enforce a tax title against an individual or entity entitled to notice under § 140 is "forever barred" if the tax title holder fails to make a bona fide attempt to give the required notice within five years to that individual or entity. M.C.L. § 211.73a; Halabu v. Behnke, 213 Mich.App. 598, 604, 541 N.W.2d 285 (1995).
As we held in our prior decision, Bailey lost his right to redeem the subject property when he failed to do so within the six-month period permitted by § 140 and § 141. See Halabu, supra at 606, 541 N.W.2d 285. Consequently, Bailey had no standing to assert plaintiff's failure give notice to Bond, the holder of a recorded mortgage at the time the required notice was delivered to the sheriff for service on Bailey. Id.; Ottaco, supra at 91 n. 7, 607 N.W.2d 403. But because plaintiff had not served Bond with the required notice, Bond could still redeem the subject property. Sections 140, 141; Equivest, supra at 454, 656 N.W.2d 369. Even actual notice to Bond was insufficient to commence the running of the six-month period with regard to Bond because strict compliance with the statutory notice is required. Id. So, although Bailey could not assert Bond's right to redeem, Bond retained its own right to redeem.
In our prior decision, we did not address whether Bailey's rights in the subject property could be revived if Bond timely redeemed; therefore, the law of the case doctrine does not preclude our considering the question now. See, generally, Grievance Administrator v. Lopatin, 462 Mich. 235, 261-262, 612 N.W.2d 120 (2000), and Ashker v. Ford Motor Co., 245 Mich.App. 9, 13, 627 N.W.2d 1 (2001). We conclude that the statute provides the answer to this question. When property that has been sold for delinquent taxes is redeemed, the tax deed becomes void. It is not merely subject to the redeemed interest held by the individual or entity that has redeemed the property. Upon payment of the redemption amount to the county treasurer, "the tax title and all the certificates of sale shall become void and of no effect against the property to be redeemed." M.C.L. § 211.141(2). Moreover, a party that redeems the property but who does not hold a fee interest retains only that party's prior interest along with a lien against the property or parts of the property or interests in it not owned by the redeeming party for the cost of redemption or the portion of that amount that is lawfully chargeable to the other interests. M.C.L. § 211.141(4). Accordingly, the trial court properly concluded that if Bond had redeemed the subject property, plaintiff's tax deed would be void, and Bailey's fee interest would be revived, subject to Bond's mortgage and Bond's redemption lien.

C. The Hamiltons' legal rights
Next, we consider the trial court's ruling that the Hamiltons were the "legal ... assignees of Bond Corporation ... entitled to a notice of reconveyance and the opportunity to redeem within the period permitted by statute." We conclude that on this issue the trial court erred as a matter of law.
The first question is whether Bond's valid discharge of mortgage during the five-year period in which plaintiff had to perfect his tax title extinguished Bond's right to notice and its right to redeem the subject property. The parties do not dispute that before any discharge Bond was entitled to notice and redemption under M.C.L. § 211.140(1)(d) and M.C.L. § 211.141(1)(c) as an undischarged recorded *461 mortgagee. The issue is whether that right continued after the mortgage was discharged. M.C.L. § 211.140(1) provides that the tax purchaser must notify those who were mortgagees "as of the date the notice was delivered to the sheriff for service...." Applying the plain meaning of the statute, the right to notice depends on the entity's status at the time notice was delivered to the sheriff for service on any person entitled to notice under subsection 140(1). In this case, the time fixing the right to notice occurred when plaintiff delivered notice to the sheriff for service on Bailey. See Ottaco, supra at 91 n. 7, 93, 607 N.W.2d 403.
On the other hand, under M.C.L. § 211.141(1), the right to redeem is not based on the time of notice; it is based on the time of redemption. Subsection 141(1) lists the parties entitled to receive from the tax title claimant a release and quitclaim upon payment of the redemption amount within six months after the return of service is filed or the proof of publication of the notice is filed as prescribed in § 140. The list includes:
(a) A person with an estate in the property.
(b) A person with an interest in the property, either in fee, for life, or for years.
(c) A mortgagee of the property.
(d) An assignee of an undischarged mortgage on the property.
(e) A person who holds a lien on the property.
(f) An executor, administrator, trustee, or guardian of a person set forth in subdivisions (a) through (e). [M.C.L. § 211.141(1).]
By its plain wording § 141 only extends the right to redeem to persons or entities having existing specified interests in the subject property. But if the list in subsection 141(1) is read literally, persons having interests in the property, which interests arise after the time fixing the right to notice under § 140 may also have a right to redeem. This ambiguity permits judicial construction of § 141. Sun Valley Foods Co. v. Ward, 460 Mich. 230, 236, 596 N.W.2d 119 (1999). The primary task of judicial construction of statutes is to discern and give effect to the intent of the Legislature. Id. This Court must determine the reasonable construction that best effects the intent of the Legislature. Frankenmuth Mut. Ins. Co. v. Marlette Homes, Inc., 456 Mich. 511, 515, 573 N.W.2d 611 (1998); Draprop Corp. v. Ann Arbor, 247 Mich.App. 410, 415, 636 N.W.2d 787 (2001). Moreover, statutes that relate to the same subject or share a common purpose are in pari materia and must be read together as one law, State Treasurer v. Schuster, 456 Mich. 408, 417, 572 N.W.2d 628 (1998), and parts of the same statute must be construed as a harmonious whole to effectuate the intent of the Legislature, Macomb Co. Prosecutor v. Murphy, 464 Mich. 149, 159, 627 N.W.2d 247 (2001).
Both § 140 and § 141 are part of the General Property Tax Act, M.C.L. § 211.1 et seq., and address the right to redeem property sold for delinquent taxes. Also, subsection 141(1) specifically refers to the six-month period "after the return of service... is filed as prescribed in section 140...." Accordingly, § 140 and § 141 are in pari materia and must be construed together to ascertain the intent of the Legislature. We conclude that only those persons or entities entitled to notice under § 140, or their successors in interest, who continue to hold an existing interest described in § 141, have the right to redeem. We reach this conclusion because it is the most reasonable way to construe M.C.L. § 211.141(1) when read with M.C.L. § 211.140. Under this construction, Bond could no longer redeem the property after *462 its mortgage was discharged, even though Bond's right to notice continued under the strict compliance doctrine. Equivest, supra at 453-454, 656 N.W.2d 369. Thus, Bond could not assign any right to redeem unless it also properly assigned its mortgage on the property.
As already discussed, because Bailey forfeited his right to redeem the property, he could not rely on plaintiff's failure to notify Bond to revive his own interest. Halabu, supra at 602, 605-606, 541 N.W.2d 285. The only remaining parties are the Hamiltons. If Bond discharged its mortgage, and Bailey gave the Hamiltons a new mortgage, the Hamiltons were not entitled to notice because the mortgage was not recorded when plaintiff sent Bailey his notice. M.C.L. § 211.140(1); Ottaco, supra at 91 n. 7, 607 N.W.2d 403. For the same reasons, if the Hamiltons received only a new mortgage from Bailey, they would not have a right to redeem under M.C.L. § 211.141(1). Bailey could not convey or create rights to the subject property that he had already forfeited. In sum, if the Hamiltons acquired the right to redeem the subject property they did so only through an assignment by Bond to them of Bond's mortgage. M.C.L. § 211.141(1)(d).
Under general contract law, rights can be assigned unless the assignment is clearly restricted. Calamari & Perillo, Contracts (3d ed), § 18-10, p. 735. An assignee stands in the position of the assignor, possessing the same rights and being subject to the same defenses. Nichols v. Lee, 10 Mich. 526, 528-529 (1862). See, also, Professional Rehabilitation Assoc. v. State Farm Mut. Automobile Ins. Co., 228 Mich.App. 167, 177, 577 N.W.2d 909 (1998), and First of America Bank v. Thompson, 217 Mich.App. 581, 587, 552 N.W.2d 516 (1996). Because a mortgage assignee has the same rights as the assignor, and because M.C.L. § 211.141(1)(d) accords the "assignee of an undischarged mortgage on the property" the right to redeem the property, if Bond properly assigned its mortgage to the Hamiltons, they had a right to redeem and could rely on the failure to provide Bond notice.
The trial court relied on two late-1999 documents to find that Bond had assigned its mortgage to the Hamiltons. On its face, one document was plainly a discharge by Bond of the recorded, undischarged mortgage it held at the time notice was delivered for service on Bailey.[8] The other document was a mortgage Bailey granted to the Hamiltons. These documents were subsequently recorded. Two years later, Bond purported to assign to the Hamiltons its rights under the mortgage it had discharged. But a mortgage cannot be assigned after it has been discharged. Plasger v. Leonard, 312 Mich. 561, 564, 20 N.W.2d 296 (1945). "After a debt is discharged, an assignment of a mortgage without the debt is a mere nullity." Id., citing Ladue v. Detroit & M R Co., 13 Mich. 380, 396 (1865). This is so because a mortgage is merely a "chose in action"a secondary incident to the debt to secure its payment through a lien on specific property. Leonard, supra; Ladue, supra at 394-395. Therefore, the next issue is whether Bond's discharge of mortgage recorded simultaneously with the mortgage from Bailey to the Hamilton's *463 could create an assignment of Bond's mortgage to the Hamiltons.
There is little case law in this state regarding what elements are necessary to create an assignment. In Weston v. Dowty, 163 Mich.App. 238, 242, 414 N.W.2d 165 (1987), this Court opined "there must be a perfected transaction between the parties which is intended to vest in the assignee a present right in the thing assigned." Further, Michigan's version of the statute of frauds requires that an assignment of "things in action"[9] be "in writing and signed with an authorized signature by the party to be charged with the agreement, contract, or promise...." M.C.L. § 566.132(1)(f). Thus, under Michigan law, a written instrument, even if poorly drafted, creates an assignment if it clearly reflects the intent of the assignor to presently transfer "the thing" to the assignee. Hovey v. Grand Trunk W. R. Co., 135 Mich. 147, 149, 97 N.W. 398 (1903).
Foreign jurisdictions have also held generally that an assignment requires an assignor's intent to presently assign be clearly manifested. "No `particular form of words is required for an assignment, but the assignor must manifest an intent to transfer and must not retain any control or any power of revocation.'" Travertine Corp. v. Lexington-Silverwood, 670 N.W.2d 444, 447 (Minn.App., 2003), quoting Minnesota Mut. Life Ins. Co. v. Anderson, 504 N.W.2d 284, 286 (Minn. App., 1993). See, also, E & L Rental Equip., Inc. v. Gifford, 744 N.E.2d 1007, 1011 (Ind.App., 2001), quoting Brown v. Indiana Nat'l Bank, 476 N.E.2d 888, 894 (Ind.App., 1985); "`In determining whether an assignment has been made, the question is one of intent. A written agreement assigning a subject matter must manifest the assignor's intent to transfer the subject matter clearly and unconditionally to the assignee.'" (Citations omitted.)
The Hamiltons rely heavily on their intent, relative Shelley Hamilton's intent, and Bailey's intent, to argue that the parties clearly intended that the documents at issue would permit the Hamiltons to assume Bond's position as mortgagee. This argument has several flaws. First, the only parties that could create a document assigning Bond's mortgage to the Hamiltons are Bond and the Hamiltons. Bailey could not create an assignment from Bond to the Hamiltons. Second, a fundamental tenet of all contracts is the existence of mutual assent or a meeting of the minds on all essential terms of a contract. Quality Products & Concepts Co. v. Nagel Precision, Inc., 469 Mich. 362, 364, 666 N.W.2d 251 (2003); Kamalnath v. Mercy Mem. Hosp. Corp., 194 Mich.App. 543, 548-549, 487 N.W.2d 499 (1992). Moreover, with respect to an assignment, the assignor must clearly manifest a present transfer.[10] Here, the assignor would *464 have to be Bond. Bond did not clearly manifest a present transfer. Bond had long since discharged its mortgage. Hovey, supra; Brown, supra. Last, the Hamiltons' logic is flawed because the unilateral subjective intent of one party cannot control the terms of a contract. "`It is beyond doubt that the actual mental processes of the contracting parties are wholly irrelevant to the construction of contractual terms. Rather, the law presumes that the parties understand the import of a written contract and had the intention manifested by its terms.'" Zurcher v. Herveat, 238 Mich.App. 267, 299, 605 N.W.2d 329 (1999), quoting Zurich Ins. Co. v. CCR & Co. (On Rehearing), 226 Mich. App. 599, 604, 576 N.W.2d 392 (1997) (O'Connell, J.). See, also, Wilkie v. Auto-Owners Ins. Co., 469 Mich. 41, 51, 664 N.W.2d 776 (2003).
The main goal of contract interpretation generally is to enforce the parties' intent. Mahnick v. Bell Co., 256 Mich.App. 154, 158-159, 662 N.W.2d 830 (2003). But when the language of a document is clear and unambiguous, interpretation is limited to the actual words used, Universal Underwriters Ins. Co. v. Kneeland, 464 Mich. 491, 496, 628 N.W.2d 491 (2001), and parol evidence is inadmissible to prove a different intent, Meagher v. Wayne State Univ., 222 Mich.App. 700, 722, 565 N.W.2d 401 (1997). An unambiguous contract must be enforced according to its terms. Mahnick, supra at 159, 662 N.W.2d 830. The judiciary may not rewrite contracts on the basis of discerned "reasonable expectations" of the parties because to do so "is contrary to the bedrock principle of American contract law that parties are free to contract as they see fit, and the courts are to enforce the agreement as written absent some highly unusual circumstance, such as a contract in violation of law or public policy." Wilkie, supra at 51, 664 N.W.2d 776.
Here, nothing in the discharge or mortgage documents indicates that the documents are anything but what they purport to be. For the reasons already discussed, Bailey's mortgage to the Hamiltons cannot effectuate an assignment to the Hamiltons of Bond's mortgage. Accordingly, the mere fact that Bailey's mortgage to the Hamiltons and Bond's discharge were recorded on the same day cannot create an ambiguity in the plain language of the discharge. The trial court therefore erred by considering parol evidence to find the discharge to be something other than what it plainly purported to be. Meagher, supra.
Although no statute specifically addresses whether a document labeled a discharge can act as an assignment, several shed light on the issue. When a document stating that a mortgage is discharged is filed with the register of deeds, the mortgage is discharged. M.C.L. § 565.41. Every document assigning, conveying, or disposing of an interest in real estate that is submitted for recording must provide a statement identifying the event it evidences, M.C.L. § 565.201(1)(f)(ii), and must purport to evidence only one event, M.C.L. § 565.201(3). These statutes support the conclusion that the recorded discharge cannot be evidence of an event different from that stated on the document.
In sum, no legal basis exists to treat the Bond's mortgage discharge and Bailey's mortgage to the Hamiltons as an assignment from Bond to the Hamiltons. The trial court erred as a matter of law by ruling to the contrary.

D. The Hamiltons' equitable rights
Finally, we consider the trial court's ruling that the Hamiltons were the "equitable assignees of Bond Corporation... entitled to a notice of reconveyance *465 and the opportunity to redeem within the period permitted by statute." We again conclude that the trial court erred.
An "equitable assignment" is defined to include an "order, writing, or act by the assignor that makes an absolute appropriation of a chose in action or fund to the use of the assignee with the intent of transferring a present interest, but does not amount to a legal assignment." 6 Am. Jur. 2d, Assignments, § 5, p. 155. So, where a legal instrument fails to create an assignment but the circumstances clearly establish the assignor's intent to presently transfer an interest, an equitable assignment may arise. As we discussed in part II(C) of this opinion, the Hamiltons relied on their own subjective intent but presented no clear evidence that Bond intended its discharge to be anything other than the discharge it purports to be. Moreover, the quitclaim deed that Bond subsequently issued recites it is "[f]or full consideration of funds advanced by [the Hamiltons] to discharge [Bailey's] mortgage." (Emphasis added.) And the "assignment" that Bond gave to the Hamiltons in November 2001 disclaims any warranty that it conveyed any rights. Rather, the "assignment" recites it was issued solely on the basis of representations made by the Hamiltons.
Although the Hamiltons' representations of their understanding of the legal import of the transactions in 1999 were not disputed, a misunderstanding of the law is generally not sufficient ground for equitable relief. Sentry Ins. v. ClaimsCo Int'l, Inc., 239 Mich.App. 443, 447, 608 N.W.2d 519 (2000). Further, this Court and our Supreme Court have held that equity cannot be used to avoid the dictates of a statute, absent fraud, accident, or mistake. See Stokes v. Millen Roofing Co., 466 Mich. 660, 671-672, 649 N.W.2d 371 (2002), and Freeman v. Wozniak, 241 Mich.App. 633, 637-638, 617 N.W.2d 46 (2000).
The Hamiltons rely on the concept of equitable mortgages discussed in Schram v. Burt, 111 F.2d 557, 561-562 (C.A.6, 1940). Although Schram involved curing a defect in a mortgage, equitable mortgages are generally found when what appears to be an absolute conveyance on its face was actually intended as a mortgage. See Townsend v. Chase Manhattan Mtg. Corp., 254 Mich.App. 133, 138, 657 N.W.2d 741 (2002). An equitable mortgage places the substance of the parties' intent over form. See, e.g., Hess v. Haas, 230 Mich. 646, 651-652, 203 N.W. 471 (1925). But as we have already noted, this case is clearly different because the record contains no evidence that Bond intended to assign, rather then discharge, its mortgage. Here, the trial court applied equity not to enforce the assignor's intent, but to save the purported assignees from their own legal mistake. Further, the trial court invoked its equitable authority to the detriment of a party not involved in the faulty transaction.
We find it important that the one party the trial court seeks to protect, Bailey, had numerous opportunities to redeem this property but did not do so. See Ottaco, supra at 90-91, 607 N.W.2d 403, for a description of the notice and redemption periods. This extensive notice procedure sufficiently protects the constitutional rights of property owners. Smith v. Cliffs on the Bay Condo. Ass'n, 463 Mich. 420, 428-429, 617 N.W.2d 536 (2000). Although the Hamiltons did not have the opportunity to redeem, they were aware of the existing legal situation when they agreed to loan money to Bailey in part to pay Bond's mortgage. We do not doubt that the Hamiltons wanted to step into Bond's legal shoes, but the transactions here did not accomplish that goal. Equity is not *466 intended to aid persons who either make poor business decisions or undertake legal transactions without the assistance of counsel.
Moreover, contrary to the trial court's reasoning, the Hamiltons will not necessarily lose $25,000. The Hamiltons aver in their affidavits that their loan to Bailey is a legal obligation they fully intend to enforce. They still may do so, albeit not by seeking to foreclose on the property here at issue. If Bailey fails to repay the Hamiltons as agreed, the Hamiltons may reduce the debt to a judgment and pursue any remedy available to judgment creditors. We conclude that the trial court stretched its equity powers beyond a permissible point.

III. Conclusion
The trial court erred by granting defendant Bailey and intervening defendants summary disposition because, by clear language, Bond discharged its mortgage, and there is no evidence that Bond intended to assign instead of discharge its mortgage. We agree that the trial court correctly concluded that no material fact was in dispute, but we find that upon those undisputed facts plaintiff was entitled to judgment as a matter of law. MCR 2.116(I)(2); Auto-Owners Ins, supra at 397, 605 N.W.2d 685. Consequently, the trial court erred by not granting plaintiff summary disposition. MCR 2.116(I)(2).
We reverse and remand for entry of judgment for plaintiff. We do not retain jurisdiction.
NOTES
[1]  M.C.L. § 211.141(2) provides, in part, "[r]edemption shall be made by paying to the treasurer of the county in which the property is situated, all sums paid as a condition of the [tax sale] purchase, together with an additional 50%."
[2]  M.C.L. § 211.73a was repealed effective December 31, 2003, by 1999 P.A. 123 (enacting § 4).
[3]  See n. 1.
[4]  Docket No. 223706.
[5]  The Legislature has extensively amended the procedure to collect taxes assessed after December 31, 1998, that are delinquent, replacing the statutes here at issue with a system of forfeiture, foreclosure, and sale. See 1999 P.A. 123. The statutes pertinent to this case have been repealed effective December 31, 2003, or will be repealed effective December 31, 2006. Id. (enacting §§ 4 and 5); 2001 P.A. 94 (enacting § 1). The statutes cited in this opinion refer to those in effect on August 31, 1998, when plaintiff obtained his tax deed.
[6]  M.C.L. § 211.140 was repealed effective December 31, 2003, by 2001 P.A. 94 (enacting § 1).
[7]  See n. 1.
[8]  It is undisputed that plaintiff obtained his tax deed on August 31, 1998, and recorded it on October 14, 1998. It is further undisputed that plaintiff delivered the notice required by M.C.L. § 211.140(2) to the sheriff for service on Bailey on June 16, 1998, and Bailey was served on June 19, 1998. Plaintiff recorded his notice of claim under tax deed and proof of service on Bailey on January 14, 1999.
[9]  A "chose in action" is a "`right to personal things of which the owner has not the possession, but merely a right of action for their possession.'" City of Holland v. Fillmore Twp., 363 Mich. 38, 43, 108 N.W.2d 840 (1961), quoting Black's Law Dictionary (4th ed), p 305. A "thing in action" is synonymous with a "chose in action." See Powers v. Fisher, 279 Mich. 442, 448-449, 272 N.W. 737 (1937). See also Ballentine's Law Dictionary (3d ed), defining "chose in action" as "the right of a creditor to be paid; a right not reduced to possession but recoverable by bringing and maintaining an action," and "thing in action" as the "same as chose in action."
[10]  The Hamiltons offer no evidence that Bond intended its discharge to transfer its mortgage to them. The subsequent assignment and quitclaim deed executed in 2001 based on the self-serving averments of the Hamiltons were carefully worded to disclaim any representation by Bond that its earlier discharge was actually an assignment.
