
553 S.E.2d 162 (2001)
250 Ga. App. 350
ROBERSON,
v.
OCWEN FEDERAL BANK FSB.
No. A01A1015.
Court of Appeals of Georgia.
July 2, 2001.
*164 Madia Roberson, pro se.
Frederick J. Hanna & Associates, Elizabeth C. Whealler, for appellee.
*163 ELDRIDGE, Judge.
This a pro se appeal from the grant of summary judgment on an admitted credit card debt, which was not in dispute. We affirm.
On September 1, 1989, Madia W. Roberson applied for and received a First Union National Bank MasterCard credit card. As of October 10, 1998, Roberson owed interest and principal of $12,779.58 as shown on her last statement, which remained unpaid. On October 19, 1999, Ocwen Federal Bank, assignee of this account, sued Roberson for the unpaid balance, interest, and attorney fees. In her amended answer, defendant admitted to owing this debt. When the plaintiff brought its motion for summary judgment, Roberson introduced no evidence in opposition, not even her own affidavit. All that the defendant did was file a motion to strike the affidavit of plaintiff's vice president, because she alleged that his signature was a stamp and that the affiant could not testify to these facts of his own knowledge. The trial court denied the motion to strike and granted summary judgment.
1. Defendant's first enumeration of error is that the trial court erred in granting summary judgment.
(a) Defendant admitted that she entered into the credit card agreement and that she owed the money plus interest. Plaintiff, through its vice president, explained that the original written and executed credit card agreement was no longer available for introduction into evidence, because in the passage of over ten years and the assignment of the account, the original written agreement had been destroyed; the content of the original agreement was established through the un-executed form as identical in terms to the missing original agreement. Such blank form credit card agreement and the testimony regarding the original agreement constituted admissible secondary evidence, because it was relevant; the existence of the original was established as an executed written agreement; reasonable diligence was exercised to find the original; the absence of the original was accounted for; and the blank form was established as the same as the executed destroyed agreement. OCGA §§ 24-5-1 through 24-5-4; Clark v. State, 271 Ga. 6, 11(6), 515 S.E.2d 155 (1999); White v. Dilworth, 178 Ga.App. 226, 227(2), 342 S.E.2d 709 (1986). In this case, plaintiff explained that, through the passage of time, this old agreement had been destroyed, which satisfies the requirement that the agreement be adequately accounted for by the plaintiff prior to the introduction of secondary evidence. Clark v. State, supra at 11, 515 S.E.2d 155; White v. Dilworth, supra at 227, 342 S.E.2d 709. A party can prove by testimony and other secondary evidence the existence and terms of a written executed contract when the loss or destruction of the original written contract has been sufficiently accounted for to establish the contract and the reason for its unavailability after the exercise of diligence to produce it. Gen. Ins. Svcs. v. Marcola, 231 Ga.App. 144, 148(5)(b), 497 S.E.2d 679 (1998); Equifax Svcs., v. Examination Mgmt. Svcs., 216 Ga.App. 35, 38(1), 453 S.E.2d 488 (1994). The balance due on an account may be testified to by a witness without the introduction of the supporting documents as secondary evidence; however, in this case the last statement and demand for payment to the defendant was introduced into evidence as an exhibit to the affidavit as a business record exception to the hearsay rule. Professional Ins. Svcs., v. Sizemore Elec. Co., 188 Ga.App. 463, 464(1), 373 S.E.2d 276 (1988). However, although the defendant objected to the admission of the affidavit in support of plaintiff's motion for summary judgment, no objection to the *165 admission of the affidavit and form credit card agreement was made before the trial court on the best evidence grounds. Failure to raise such objection waives such issue. Id. at 463, 373 S.E.2d 276.
(b) Plaintiff proved the written executed agreement, terms of the agreement, the balance due, the interest, and attorney fees; defendant admitted the agreement and the amounts due. Further, defendant failed to come forward with any evidence to create a material issue of fact either as to liability or damages. See Adamson Co., v. Owens-Illinois Dev. Corp., 168 Ga.App. 654, 657, 309 S.E.2d 913 (1983). Plaintiff is entitled to summary judgment from the entire evidence record. See Lau's Corp., v. Haskins, 261 Ga. 491, 405 S.E.2d 474 (1991).
2. Defendant contends that the trial court erred in denying her motion to strike the affidavit in support of plaintiff's motion for summary judgment. We do not agree.
Defendant filed a motion to strike the affidavit under OCGA § 9-11-12(f). Motions to strike seek to purge from the pleadings or affidavit only insufficient defenses or matter that is redundant, immaterial, impertinent, or scandalous. Guthrie v. Bank South Douglas, 195 Ga.App. 123, 125-126(4), 393 S.E.2d 60 (1990) (physical precedent only); Northwestern. &c Ins. Co., v. McGivern, 132 Ga.App. 297, 301-304(3), 208 S.E.2d 258 (1974).
Affidavits must conform to OCGA § 9-11-56(e), which is a codification of the common law requirements as to affidavits. McPherson v. McPherson, 238 Ga. 271, 272(1), 232 S.E.2d 552 (1977). A complete affidavit must satisfy three essential elements: (a) a written oath embodying the facts as sworn to by the affiant; (b) the signature of the affiant; and (c) the attestation by an officer authorized to administer the oath that the affidavit was actually sworn by the affiant before the officer. Glenn v. MARTRA, 158 Ga.App. 98, 99, 279 S.E.2d 481 (1981). Affidavits that fail to comply or to contain the essential elements must be disregarded by the trial court and only such portions as comply are considered. Short & Paulk Supply Co., v. Dykes, 120 Ga.App. 639, 645-646(3), 171 S.E.2d 782 (1969). Only such portion of an affidavit that sets forth facts that are admissible in evidence can be considered. Oglesby v. Farmers Mut. Exchange, 128 Ga.App. 387, 389(6), 196 S.E.2d 674 (1973). A motion to strike the affidavit in support of a motion for summary judgment, if properly and timely made, is a proper vehicle to attack the affidavit; however, it should specifically object to the material that is inadmissible, because the trial court must consider the admissible portions of the affidavit. Vickers v. Chrysler Credit Corp., 158 Ga.App. 434, 439-440(4), 280 S.E.2d 842 (1981); Ford v. Ga. Power Co., 151 Ga.App. 748(2)(A), 261 S.E.2d 474 (1979); Vaughn & Co., v. Saul, 143 Ga.App. 74, 78(3), 237 S.E.2d 622 (1977).
An affidavit must be sworn to in person before a notary public or other officer empowered to administer oaths for the affidavit to be valid and have the affiant's signature attached. Sambor v. Kelley, 271 Ga. 133, 134(1), 518 S.E.2d 120 (1999); Schmidt v. Feldman, 230 Ga.App. 500, 501(1), 497 S.E.2d 23 (1998); Redmond v. Shook, 218 Ga.App. 477-478(1), 462 S.E.2d 172 (1995). To attack an affidavit on improper execution grounds, there must be evidence either from the witness or notary or from the face of the affidavit showing that the execution was not made in the notary's physical presence. Sambor v. Kelley, supra at 133, 518 S.E.2d 120; Schmidt v. Feldman, supra at 501, 497 S.E.2d 23; Redmond v. Shook, supra at 477, 462 S.E.2d 172. However, in this case, the trial court made a factual determination that the affidavit filed had, in fact, been properly executed by Arthur J. Castner before a notary public. Since factual determinations made by the trial court as trier of fact can be reversed only if there is no evidence to support such finding, then this Court must affirm the trial court, because the affidavit appears to be signed rather than merely stamped as contended by the defendant without evidence to support such allegation. Thus, there was some evidence to support such determination of fact, and absent legal error we will not interfere with the trial court's determination. Wilkinson v. Udinsky, 242 Ga.App. 464(1), 530 S.E.2d 215 (2000). *166 Also defendant contends that Castner lacked personal knowledge upon which to base the affidavit. The affiant must have personal knowledge for the affidavit to have probative value. OCGA § 9-11-56(e); Worley v. Pierce, 211 Ga.App. 863, 865(2), 440 S.E.2d 749 (1994); Morris-Bancroft Paper Co., v. Coleman, 188 Ga.App. 809, 810-811, 374 S.E.2d 544 (1988). Generally, the mere statement of the affiant that the testimony given comes from personal knowledge is sufficient. Whitaker v. Trust Co., &c., 167 Ga.App. 360, 361(2), 306 S.E.2d 329 (1983). However, as in this case, the affiant clearly demonstrated personal knowledge rooted in the content of the affidavit. Edwards v. Campbell Taggart Baking Cos., 219 Ga.App. 806, 808(2), 466 S.E.2d 911 (1996).
As vice president of the plaintiff, Castner testified that he was familiar with the books and records of the bank and, from such records, demonstrated a basis to have personal knowledge that the original agreement was unavailable because it had been destroyed in the distant past; that there had been a written contract; that the terms of such contract were identical to the form agreement attached; that the last statement was sent; that the balance remained unpaid; and that interest and attorney fees were due and payable. The trial court found that the affiant had demonstrated personal knowledge and denied the motion.
"A trial court's decision overruling an objection to tendered evidence is a matter resting within the sound discretion of the trial court and will not be disturbed absent an abuse of that discretion." Clauss v. Plantation Equity Group, 236 Ga.App. 522, 523(1), 512 S.E.2d 10 (1999).
Judgment affirmed.
ANDREWS, P.J., and MILLER, J., concur.
