
192 P.3d 177 (2008)
LANDMARK NATIONAL BANK, Plaintiff/Appellee,
v.
Boyd A. KESLER, Appellee/Cross-Appellant,
Millennia Mortgage Corp., Defendant,
Mortgage Electronic Registration Systems, Inc. and Sovereign Bank, Appellants/Cross-Appellees, and
Dennis Bristow and Tony Woydziak, Intervenors/Appellees.
No. 98,489.
Court of Appeals of Kansas.
September 12, 2008.
*178 Tyson C. Langhofer and Court T. Kennedy, of Stinson Morrison Hecker, L.L.P., of Wichita, for appellants/cross-appellees.
Ted E. Knopp, of Ted E. Knopp, Chartered, of Wichita, for appellee/cross-appellant Boyd A. Kesler.
Ted E. Knopp, of Ted E. Knopp, Chartered, of Wichita, for intervenors/appellees Dennis Bristow and Tony Woydziak.
Before GREENE, P.J., MARQUARDT and LEBEN, JJ.
LEBEN, J.
Landmark National Bank brought a suit to foreclose its mortgage against Boyd Kesler and joined Millennia Mortgage Corp. as a defendant because a second mortgage had been filed of record for a loan between Kesler and Millennia. In a foreclosure suit, it is normal practice to name as defendants all parties who may claim a lien against the property. When neither Kesler nor Millennia responded to the suit, the district court gave Landmark a default judgment, entered a journal entry foreclosing Landmark's mortgage, and ordered the property sold so that sale proceeds could be applied to pay Landmark's mortgage.
But Millennia apparently had sold its mortgage to another party and no longer had interest in the property by this time. Sovereign Bank filed a motion to set aside the judgment and asserted that it now held the title to Kesler's obligation to pay the debt to *179 Millennia. And another party, Mortgage Electronic Registration Systems, Inc. ("MERS"), also filed a motion to set aside the judgment and asserted that it held legal title to the mortgage, originally on behalf of Millennia and later on behalf of Sovereign. Both Sovereign and MERS claim that MERS was a necessary party to the foreclosure lawsuit and that the judgment must be set aside because MERS wasn't included on the foreclosure suit as a defendant.
The district court refused to set aside its judgment. The court found that MERS was not a necessary party and that Sovereign had not sufficiently demonstrated its interest in the property to justify setting aside the foreclosure.

I. The District Court Properly Refused to Set Aside the Foreclosure Judgment Because MERS Was Not a Necessary Party.

To resolve these claims, we will review some basic concepts of mortgages and foreclosure proceedings. We must pay close attention not only to the terms given to the parties in carefully crafted documents but also to the roles each party actually performed. No matter the nomenclature, the true role of a party shapes the application of legal principles in this case.
A mortgage grants a title or lien against a property as security for the payment of a debt or the performance of a duty. The "mortgagor" is the borrower who grants a mortgage in exchange for a loan; the "mortgagee" is the lender who gives the loan secured by the mortgage. See Black's Law Dictionary 1031, 1034 (8th ed.2004). The mortgagee is so well understood as the lender that Black's Law Dictionary defines a "foreclosure" as an action brought by the lender/mortgagee: a foreclosure is a "legal proceeding to terminate a mortgagor's interest in property, instituted by the lender (the mortgagee) either to gain title or to force a sale in order to satisfy the unpaid debt secured by the property." Black's Law Dictionary 674. Similarly, the tie between a mortgage and an underlying debt is so intrinsic that Kansas law provides that "[t]he assignment of any mortgage . . . shall carry with it the debt thereby secured." K.S.A. 58-2323. Indeed, an assignment of a mortgage without the debt transfers nothing. 55 Am.Jur.2d, Mortgages § 1002. Thus, the mortgagee, who must have an interest in the debt, is the lender in a typical home mortgage.
But for reasons thought beneficial by a group of lenders who trade mortgages, the form of mortgage used in this case designates an entity that is not the lender as the mortgagee. See MERSCORP, Inc. v. Romaine, 8 N.Y.3d 90, 96, 828 N.Y.S.2d 266, 861 N.E.2d 81 (2006) (MERS was established by large lenders to allow easy electronic trading and tracking of mortgages). Specifically, the mortgage says that the mortgagee is MERS, though "solely as nominee for Lender." Does this mean that MERS really was the mortgagee, even though it didn't lend money or have any rights to loan repayments? Assuming so, MERS argues that it was a necessary party to the foreclosure and that the foreclosure must be set aside. But the premise upon which MERS bases this argument is flawed.
What is MERS's interest? MERS claims that it holds the title to the second mortgage, not the real estate. So it does, but only as a nominee. In terms of the roles that we've discussed in the mortgage business, MERS holds the mortgage but without rights to the debt. The district court found that MERS was merely an agent for the principal player, Millennia. While MERS objects to its characterization as an agent, it's a fair one.
MERS had no right to the underlying debt repayment secured by the mortgage; MERS did not even act as the servicing agent to receive the payments and remit them to the lender. MERS's right to act to enforce the mortgage was strictly limited: if "necessary to comply with law or custom," MERS could foreclose the mortgage or enter a release of the mortgage. MERS certainly could not act at odds to its principal, the lender. Its role fits the classic definition of an agent: one "`authorized by another to act for him, or intrusted with another's business.'" In re Tax Appeal of Scholastic Book Clubs, Inc., 260 Kan. 528, 534, 920 P.2d 947 (1996) (quoting Black's Law Dictionary 85 [4th ed.1968]).
*180 Only one Kansas case has discussed the meaning of nominee in any detail. In Thompson v. Meyers, 211 Kan. 26, 30, 505 P.2d 680 (1973), the court noted that the meaning of the term may vary from a pure straw man or limited agent to one who has broader authority.
But whatever authority the nominee may have comes from the delegation of that authority by the principal. In its ordinary meaning, a nominee represents the principal in only a "nominal capacity" and does not receive any property or ownership rights of the person represented. See, e.g., Cisco v. Van Lew, 60 Cal.App.2d 575, 583-84, 141 P.2d 433 (1943); see also Applebaum v. Avaya, Inc., 812 A.2d 880, 889 (Del.2002) (referring to nominees "as agents of the beneficial owners"). The Millennia mortgage does not purport to give MERS any greater rights than normally given a nominee. The mortgage says that MERS acts "solely as nominee for Lender." There is no express grant of any right to MERS to transfer or sell the mortgage or even to assign its duties as nominee. Nor does MERS obtain any right to the borrower's payments or even a role in receiving payments.
MERS and Sovereign correctly note that a foreclosure judgment may be set aside for failure to join a contingently necessary party. E.g., Wisconsin Finance v. Garlock, 140 Wis.2d 506, 512, 410 N.W.2d 649 (1987). For the purposes of our case, a party is contingently necessary under K.S.A. 60-219 if the party claims an interest in the property at issue and the party is so situated that resolution of the lawsuit without that party may "as a practical matter substantially impair or impede [its] ability to protect that interest." The real issue is that of the lender, the true mortgagee, to protect its security interest against the property. Whether MERS may act as a nominee for the lender, either to bring a foreclosure suit or for some other purpose, is not at issue in Landmark's foreclosure lawsuit. Moreover, an agent for a disclosed principal is not a necessary party to a lawsuit adjudicating the substantive rights of the principal. Hotel Constructors, Inc. v. Seagrave Corp., 99 F.R.D. 591, 592 (S.D.N.Y.1983); Liles v. Winters Independent School District, 326 S.W.2d 182, 188 (Tex.App.1959).
In support of the necessary-party argument, MERS and Sovereign cite Dugan v. First Nat'l Bank in Wichita, 227 Kan. 201, 606 P.2d 1009 (1980). In Dugan, a bank agreed to act as escrow agent for three parties who loaned money and obtained a mortgage as collateral. The bank was to receive all repayments made on the various loans and then remit them to the lenders in the appropriate percentages; the bank was also the named mortgagee, apparently due to the multiple lenders who were separate actors. The court held that the bank and the lenders were all necessary parties to the lawsuit, in which the borrower sought reformation or cancellation of the mortgages based on fraud and breach-of-fiduciary-duty claims. The bank was a necessary party even though it had no direct financial interest in the loans and would "be affected only tangentially in its position as designated mortgagee and escrow agent." 227 Kan. at 212, 606 P.2d 1009.
In response, Kesler cites Moore v. Petroleum Building, Inc. 164 Kan. 102, 187 P.2d 371 (1947). In Moore, a plaintiff had intervened in a past foreclosure action and later filed suit to enjoin a bank and escrow holder from delivering deeds to another party. The bank was used only to hold deeds that would be delivered upon termination of the leases and was not a party to the original foreclosure. The court held that the plaintiff should have raised issues regarding his rights under the escrow agreement in the previous foreclosure case, noting that "there probably was no necessity that [the bank] should have been made a party, for it stood by only as a custodian of the deeds and for no other purpose." 164 Kan. at 108, 187 P.2d 371.
We find Moore closer to our facts than Dugan. Like the bank in Moore, MERS did not receive any funds on behalf of Millennia or Sovereign. The mortgage set out clearly that the borrower, Kesler, was to pay his monthly payments to the lender. The mortgage also suggests that the reputed mortgagee, MERS, was not interested in receiving notices of default. The Millennia mortgage, which was duly recorded in the public record, included a section titled "Request For Notice *181 of Default and Foreclosure Under Superior Mortgages or Deeds of Trust." As the district court noted, that section provided that both "Borrower and Lender request" the holder of any mortgage with priority "give Notice to Lender, at Lender's address set forth on page one of this Mortgage, of any default . . . and of any sale or other foreclosure action." Millennia's address was noted on page one of the mortgage; the mortgage did not list MERS as an entity to contact upon default or foreclosure.
Two older Kansas cases should also be noted, though the parties didn't cite them. In Swenney v. Hill, 65 Kan. 826, 70 P. 868 (1902), the court faced a situation somewhat different than today's typical residential-mortgage. As part of the same transaction, a couple borrowed money and then gave mortgage bonds to two individuals and a mortgage to an investment company. Repayment of the loan was made to the bondholders, but the mortgagee/investment company had "extensive rights and active powers over the relationship" between the borrowers and the bondholders. 65 Kan. at 828, 70 P. 868. While the court did not concern itself with why this structure had been chosen, it determined that the mortgagee/investment company was a necessary party because it had a right under the written agreements to advance additional funds, thus increasing the amount of the lien, as well as the right to declare the loan matured and bring suit. In addition, the mortgage could not be released by the bondholders alone; the mortgagee/investment company was also required to approve it. We do not know from the court's opinion whether the investment company organized the transaction initially or made any guarantee of repayment to the bondholders, but the court said that the investment company had "substantial rights and interests." 65 Kan. at 829, 70 P. 868.
A second relevant case is Gibson v. Ledwitch, 84 Kan. 505, 114 P. 851 (1911). It involved the converse of our casea party sued to quiet title against a mortgage, which would clear the title from the encumbrance of that mortgage. But the plaintiff joined only a trustee who had no beneficial interest in that mortgage; the beneficial owner was not made a party. The court held that the judgment did not bind the beneficial holder of the mortgage since the trustee had no right to the payments, was not the party to declare default, and had no authority to transfer or foreclose the mortgage.
We also believe that the decisions in Swenney and Gibson are supportive of the result here. MERS does not have the sort of "substantial rights and interests" that the investment company had in Swenney. MERS points to its ability to foreclose or to release the mortgage, authority provided in the mortgage "if necessary to comply with law or custom." Kansas law does require through K.S.A. 58-2309a that a mortgage holder promptly release a mortgage when the debt has been paid; MERS could be required as a matter of law to file a mortgage release after a borrower proved that the debt had been paid. Other than that, however, it is hard to conceive of another act that MERSinstead of the lenderwould be required to take by law or custom. And although Gibson involves the converse of our case, it suggests that a party with no beneficial interest is outside the realm of necessary parties.
In addition to the claim that MERS was a necessary party under K.S.A. 60-219, MERS and Sovereign also argue that the failure to include MERS violated its due process rights. But MERS had no direct property interests at stake; even its right to act on behalf of its principal was not at issue in Landmark's suit. Without a property interest at stake, there can be no due process violation. State ex rel. Tomasic v. Unified Gov't of Wyandotte County/Kansas City, 265 Kan. 779, 809, 962 P.2d 543 (1998).
We do not attempt in this opinion to comprehensively determine all of the rights or duties of MERS as a nominee mortgagee. As the mortgage suggests may be done when "necessary to comply with law or custom," courts elsewhere have found that MERS may in some cases bring foreclosure suits in its own name. Mortgage Electronic Registration v. Azize, 965 So.2d 151 (Fla.App.2007). On the other hand, some have suggested potential problems created by MERS's practices, MERSCORP, Inc. v. Romaine, 8 N.Y.3d 90, 100-04, 828 N.Y.S.2d 266, 861 *182 N.E.2d 81 (2006) (Kaye, C.J., dissenting), or with the handling of paperwork documenting who owns what in the residential-mortgage industry in general. E.g., In re Nosek, 386 B.R. 374, 385 (Bankr.D.Mass.2008); In re Foreclosure Cases, 2007 WL 3232430 (N.D.Ohio 2007) (unpublished opinion). In this case, we are only required to address whether the failure to name and serve MERS as a defendant in a foreclosure action in which the lender of record has been served is such a fatal defect that the foreclosure judgment must be set aside. We hold that it is not.

II. The District Court Did Not Abuse Its Discretion by Denying Motions of MERS and Sovereign to Intervene After the Judgment Had Been Entered.

Neither MERS nor Sovereign argue that Landmark was required to join Sovereign. But both MERS and Sovereign argue that the district court wrongly denied their motions to intervene.
On this argument they face a major hurdle: the Kansas Supreme Court has held that there is no jurisdiction even to consider a motion to intervene made after the entry of judgment and the expiration of the 10-day period for filing new-trial motions. Smith v. Russell, 274 Kan. 1076, Syl. ¶ 4, 58 P.3d 698 (2002). Even so, timeliness is to be determined from the specific circumstances of each case. See Mohr v. State Bank of Stanley, 244 Kan. 555, 562, 770 P.2d 466 (1989). Although some caselaw allows intervention after judgment "where it is necessary to preserve some right which cannot otherwise be protected," these authorities generally have allowed intervention so that there would be appropriate representation in an appeal when a party that originally participated in the case is no longer adequately representing the intervenor's interest. E.g., Hukle v. City of Kansas City, 212 Kan. 627, 631-32, 512 P.2d 457 (1973). Of course, that's not our situation.
The intervention argument faces another hurdle too: the decision whether to permit intervention may be reversed only when no reasonable person could agree with the district court's decision. See Mohr, 244 Kan. at 561-62, 770 P.2d 466; Farmers Group, Inc. v. Lee, 29 Kan.App.2d 382, 385, 28 P.3d 413 (2001). Sovereign's motion to intervene was filed 76 days after foreclosure, 53 days after the court ordered the property sold, and 26 days after the property was sold. MERS's motion to intervene was filed 134 days after foreclosure, 111 days after the court ordered the property sold, and 84 days after the property was sold. Especially in light of Smith's holding that a court lacked jurisdiction when the motion to intervene came after the 10-day period for filing new-trial motions, we believe it would be extremely difficulteven if the district court had jurisdiction to grant interventionto reverse for an abuse of discretion on motions filed as far after judgment as those of Sovereign and MERS.
MERS and Sovereign argue that their intervention motions were timely because the time for filing an appeal had not yet run. They base this argument on a claim that the time to file an appeal doesn't begin until the sheriff's sale of the property is confirmed. But a judgment of foreclosure is a final judgment for appeal purposes when it determines the rights of the parties, the amounts to be paid, and the priority of claims. Stauth v. Brown, 241 Kan. 1, 6, 734 P.2d 1063 (1987). The foreclosure judgment in this case did so. We find no abuse of discretion in denying intervention.

III. Separate Claims by Kesler and Other Parties Are Not Properly Raised on Appeal.

Dennis Bristow and Tony Woydziak, who together bought the property at a sheriff's sale, have sought to proceed with Kesler on a cross-appeal to challenge the district court's orders enjoining them from finalizing sale of the property while the appeal was heard. They also seek a ruling that Sovereign is bound by the district court's judgment.
Kesler, Bristow, and Woydziak raise issues that are not based on the same judgments on which MERS and Sovereign have filed their appeal. The joint notice of appeal from MERS and Sovereign noted an appeal from "(1) Journal Entry of Judgment filed *183 September 6, 2006; (2) Order filed January 18, 2007; (3) Supplemental Order filed January 18, 2007; and (4) Order Denying Motions for Reconsideration filed March 22, 2007." But Kesler, Bristow, and Woydziak attempted to include a separate district court decision, entered May 2, 2007, which had denied their motions to dismiss for lack of jurisdiction the motions to intervene by MERS and Sovereign and also granted a stay pending appeal to MERS and Sovereign. A cross-appeal must involve the same judgment as the underlying appeal, but Kesler, Bristow, and Woydziak argue a separate issue from a different district court order.
Even if the same judgment were involved, notice of a cross-appeal must be filed within 20 days of the notice of appeal. MERS and Sovereign filed their joint notice of appeal on March 28, 2007; Kesler, Bristow, and Woydziak did not seek to file a cross-appeal within 20 days of that date.
This court is without jurisdiction to address the separate issues raised on appeal by Kesler, Bristow, and Woydziak.

Conclusion
The district court properly determined that MERS was not a contingently necessary party in Landmark's foreclosure action. The district court also was well within its discretion in denying motions from MERS and Sovereign to intervene after a foreclosure judgment had been entered and the foreclosed property had been sold. The judgment of the district court is affirmed.
