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E-signatures in a mortgage loan file: what lenders actually check

Updated · by the dossaia team

Illustration: a phone showing a document marked as validated

Under the federal ESIGN Act and the state versions of UETA, a signature can't be rejected just because it's electronic. What gets a signed document kicked back is everything around the signature: who signed, when, whether the file was changed afterward, and whether the evidence behind it was kept. Fannie Mae's Selling Guide spells out that evidence.

Contents5 sections

Validity is settled. Evidence is where files fail.

The ESIGN Act (15 U.S.C. § 7001) says that for a transaction in or affecting interstate commerce, a signature, contract or record can't be denied legal effect, validity or enforceability solely because it's in electronic form. It defines an electronic signature broadly: a sound, symbol or process attached to or logically associated with a record, executed or adopted by a person with the intent to sign it (§ 7006).

At the state level, the Uniform Electronic Transactions Act, approved by the Uniform Law Commission in 1999, sets the same rule in its Section 7. Two details matter in practice. UETA only applies between parties that have each agreed to transact electronically (Section 5). And New York never adopted UETA: it relies on its own Electronic Signatures and Records Act, passed in 2000.

One more federal piece sits upstream of every signature: consumer consent. When a law requires information to be given to a consumer in writing, ESIGN only lets you deliver it electronically after the borrower affirmatively consents, having been told about the right to paper copies, the right to withdraw consent, and the hardware and software needed (§ 7001(c)). That's the eConsent step in your borrower portal. Skip it and the problem isn't the signature, it's the disclosures.

What the lender's file review looks at

Fannie Mae's Selling Guide (A2-4.1-03) lets sellers use any form of electronic signature that is valid under applicable law, except audio and video recordings, as long as it is attached to or logically associated with the record. Every electronic signature must be attributable to an identified signer, and for each one the lender keeps evidence of the signer's authenticated identity, attribution to that signer, the signer's agreement to use electronic signatures, the signature date and the method used, including the eSign vendor. That evidence has to hold up to a quality control review.

What gets checkedWhat it should showWhat usually breaks it
Signer identityThe name signed matches the borrower on the application and the IDMissing middle name or suffix, a co-borrower signing for the other
DateA signature date that makes sense next to the document's own datesSigned before the document was generated, or long after the period it covers
IntegrityThe file is the one that was signed, unchangedOpened, edited, merged or re-saved after signing
Audit trailTimestamps, signer details, authentication and actions, kept with the fileOnly the signed PDF was saved, the history was not

Fannie Mae's eMortgage rules go one step further for eNotes (B8-8-01): the borrower has to take an action to start the signature, the system has to display the borrower's name, and a single electronic signature can't be applied to several records at once.

The re-saved PDF problem

A certificate-based digital signature exists precisely to catch changes. NIST's digital signature standard (FIPS 186-5) puts it plainly: digital signatures are used to detect unauthorized modifications to data and to authenticate the identity of the signatory. The signature covers the file as it was when signed.

So when a borrower opens the signed PDF and prints it to a new PDF, merges it with other pages, runs it through a compressor or edits a field, the result is a different file. The signature is either gone or flagged as changed after signing. On screen it looks identical. To any integrity check, it isn't.

The fix is one line in your request email: forward the completed file exactly as you received it, without opening and saving it. Better still, pull the completed document straight from the e-signature platform, with its history attached, instead of relying on the borrower's copy.

Where you still need ink, a notary, or the recorder's OK

ESIGN carves out some records entirely (§ 7003): wills and testamentary trusts, family law matters, most of the Uniform Commercial Code (Articles 2 and 2A excepted), court documents, and notices of default, acceleration, repossession, foreclosure, eviction or the right to cure under a credit agreement secured by an individual's primary residence. That last group belongs to servicing rather than origination, but it's the same loan.

The promissory note is the big one at closing. Fannie Mae excludes the note and its addenda from its general electronic-records rule unless the lender is approved to deliver eNotes, and it does the same for unrecorded ink-signed originals of documents that modify or supplement the security instrument. That's why so many closings still put a pen in front of the borrower for the note.

Notarized documents follow state law. UETA Section 11 lets a notary sign electronically, but it doesn't remove any of the other requirements of notarial law. Fannie Mae requires an electronic notarization to be valid under the law of the state where it's performed; for remote online notarization, the notary must be licensed and physically located in that state, the lender must keep the tamper-sealed audit trail produced by the RON system, and if the document will be recorded, the county recorder where the property sits must accept it. A lender also can't require a borrower to use remote notarization. Check the state and the county before you plan an e-closing around the security instrument.

Signed doesn't mean complete

A signature proves consent, not content. A signed form with a blank page is still missing a page. A signed letter of explanation still has to explain the right thing. And a signed authorization doesn't make an outdated statement current. The signature is one line of the review; the document behind it still has to pass on its own.

FAQ

What loan officers ask us

Are e-signatures valid on mortgage loan documents?

Yes, as a rule. The federal ESIGN Act and the state versions of UETA say a signature or record can't be denied legal effect solely because it's electronic. Fannie Mae accepts any electronic signature valid under applicable law, except audio or video recordings, as long as it's attributable to an identified signer and the lender keeps the evidence behind it.

Can the borrower e-sign the promissory note?

Only as an eNote. Fannie Mae's Selling Guide excludes the promissory note and its addenda from its general electronic-documents rule unless the lender has Fannie Mae's approval to deliver eNotes. Otherwise the note is ink-signed.

Why would an underwriter push back on an e-signed document?

Rarely because it's electronic. Usually because the signer's name doesn't match the borrower, the dates don't make sense, the PDF was changed or re-saved after signing so the signature no longer checks out, or the audit trail wasn't kept with the file.

Can a lender require remote online notarization?

Not for loans sold to Fannie Mae: its Selling Guide says a lender may not require a borrower to use remote notarization and must offer other notary options on request. Remote notarization also has to be valid in the state where it's performed, and a recorded document must be accepted by the county recorder.

Sources · checked October 29, 2026

  1. 15 U.S.C. § 7001 — ESIGN Act, general rule of validity and consumer consent (Legal Information Institute, Cornell Law School)
  2. 15 U.S.C. § 7003 — ESIGN Act, specific exceptions
  3. 15 U.S.C. § 7006 — ESIGN Act, definitions
  4. Uniform Law Commission — Electronic Transactions Act (UETA, 1999), Sections 5, 7, 9 and 11
  5. New York City Bar — Modernizing New York's electronic signatures law (ESRA and UETA), January 16, 2026
  6. Fannie Mae Selling Guide — A2-4.1-03, Electronic Records, Signatures, and Transactions (05/06/2026)
  7. Fannie Mae Selling Guide — B8-8-01, General Information on eMortgages (11/05/2025)
  8. NIST — FIPS 186-5, Digital Signature Standard (February 3, 2023)
  9. signNow Help Center — Security, compliance, and data protection

General information for loan professionals, not legal advice. Investor and state rules change: check the current text before relying on it.

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