Wet Signature

A wet signature is a handwritten, ink-on-paper signature applied directly to a physical document.

Reviewed by GC AI Solutions Team•Updated September 6, 2026

Definition

A wet signature is a name or mark that a person writes by hand, in ink, onto a physical document. The term separates a pen-and-paper signature from an electronic signature applied through software, and it takes its name from ink that stays wet after the pen lifts. Electronic-signature laws protect electronic execution in covered transactions. Their exclusions leave the applicable law to determine execution requirements. A wet signature may still be necessary under that law, the parties’ agreement, or a receiving authority’s requirements.

What It Does

For in-house counsel, the question is whether the signing method satisfies the agreement and the rules for this transaction. A practical test: if your counterparty emails a signed PDF today, what makes delivery effective, and does anyone still need the paper original?

Creates an ink-signed paper record that a party can retain and produce; parties may sign separate original counterparts.
Differs from an electronic signature, which uses an electronic sound, symbol, or process associated with a record and adopted with intent to sign; the evidence of identity, timing, and document integrity depends on the signing method.
Draws its federal floor from ESIGN: under 15 U.S.C. § 7001(a), a signature, contract, or record in a transaction affecting interstate commerce “may not be denied legal effect, validity, or enforceability solely because it is in electronic form.”
Leaves substantive requirements such as assent and signing authority in place; electronic records and signatures can satisfy writing and signature requirements where the applicable law permits.
Requires checking the applicable state electronic-signature law together with ESIGN’s preemption rules; New York’s Electronic Signatures and Records Act recognizes electronic signatures subject to exceptions provided by law.

The recent commercial agreements below expressly accept electronic signatures or electronic delivery alongside traditional paper execution.

When You'll See It

Wet-signature questions arise in commercial execution clauses and in documents subject to special formalities. Section 7003 excludes specified records from ESIGN’s general validity rule; the governing law determines which signing methods remain available. A digital signature uses cryptography to authenticate a signer and detect document changes. That technology still operates within the applicable execution rules.

Wills, Codicils, and Testamentary Trusts: Section 7003(a)(1) excludes records governed by laws on creating and executing these instruments. Check the governing probate law for permitted electronic execution and the required witnesses or other safeguards.

Adoption, divorce, and other family law matters: Section 7003(a)(2) exempts records governed by state law on these subjects.

Most of the Uniform Commercial Code: Section 7003(a)(3) exempts the UCC as in effect in any state, other than sections 1-107 and 1-206 and Articles 2 and 2A. For records governed by Article 3 or Article 9, check the state’s UCC and other applicable electronic-record laws, including their scope exclusions. Section 7021 may also apply to a qualifying electronic note.

Court filings: Section 7003(b)(1) exempts court orders or notices, and official court documents including briefs, pleadings, and other writings required to be executed in connection with court proceedings. Individual courts set their own electronic filing rules, so local rules control the practical answer.

Specified consumer notices and dangerous materials documents: Section 7003(b)(2) exempts notices of utility cancellation, default, acceleration, repossession, foreclosure, or eviction under a credit agreement secured by or a rental agreement for an individual’s primary residence, cancellation of health or life insurance benefits (excluding annuities), and product recall or material product failure that risks health or safety. Section 7003(b)(3) exempts documents required to accompany transportation or handling of hazardous materials, pesticides, or other toxic or dangerous materials.

Notarized and Recorded Instruments: Check whether the relevant state currently permits remote online notarization for the instrument and whether the receiving recorder accepts it. Enacting a law and making the process operational can occur on different dates, as the California Secretary of State’s guidance explains.

Non-US formality regimes: German law distinguishes execution from filing. BGB Section 311b(1) generally requires notarial recording of contracts obligating a party to transfer or acquire land. HGB Section 12 requires electronic submission of commercial-register applications in publicly certified form. Have local counsel confirm the instrument’s execution and filing requirements.

Examples

Alexander's, Inc.

Lease Amendment (Bloomberg L.P. Tenant)Counterparts e-signature equivalenceMutual2026

This Amendment may be executed in counterparts, it being understood that all such counterparts, taken together, shall constitute one and the same agreement, and by exchange of electronic "PDF" signatures, by DocuSign or similar application, or by other electronic means, which shall (i) have the same effect as original signatures, (ii) constitute valid execution of this Amendment, and (iii) be binding upon such party as though it had physically delivered a paper counterpart bearing its original, "wet ink" signature; and each party hereby waives any claims or defenses to the contrary.

Source

BeiGene, Ltd.

Settlement Agreement AmendmentSettlement e-signature equivalenceMutual2025

Any manual signature on this Agreement that is faxed, scanned, photocopied, emailed or otherwise electronically transmitted in any generally accepted format, and any electronic signature valid under the Electronic Signatures in Global and National Commerce Act, 15 U.S.C. § 7001, et. seq. shall for all purposes have the same validity, legal effect and admissibility in evidence as an original manual "wet ink" signature, and the Parties hereby waive any objection to the contrary.

Source

SoFi Technologies, Inc.,

Amendment to LeaseCounterparts e-signature equivalenceMutual2026

This Amendment to Lease may be executed in multiple counterparts, and by each party on separate counterparts, each of which shall be deemed to be an original but all of which shall together constitute one agreement. Delivery by any party of an electronic or pdf copy of such party's original, wet-ink signature shall be fully effective as if such original, wet-ink signature was delivered.

Source

Ceribell, Inc.

Patent License Amendment With StanfordLicense e-signature equivalenceMutual2025

The Parties agree that signatures, electronic or wet ink, of this Agreement transmitted by email in "portable document format" ("PDF"), or by any other electronic means, intended to preserve the original appearance of this Agreement, shall have the same effect as physical delivery of the paper document bearing an original wet ink signature. The Parties further waive any right to challenge the admissibility or authenticity of this document in a court of law based solely on the absence of an ink or printed signature.

Source

Greif, Inc.

Facility Extension Letter (Netherlands Law)Cross-border e-signature equivalenceMutual2026

Each of the parties agree that this Extension Letter may be signed with an electronic signature (including, but not limited to, by using any level/authentication of "DocuSign" or using a mouse draw signature) and that such electronic signature once provided will have the same legal effects as a written ('wet-ink') signature.

Source

Negotiate

If You’re the Customer:

You want a signing method that binds on the day you close, and a record that still proves it later.

Name the signing methods that bind, including mixed execution where one side signs in ink and the other electronically, so the format is settled before closing.
Ask what a wet-ink demand rests on. Where it reflects the supplier’s internal policy rather than governing law or a receiving authority, negotiate a permitted electronic alternative.
Put custody of originals, certified copies, and signature records on one named party, with a duty to produce them when a court, lender, or registry asks.
Fix the effective date on signature and delivery, and state that later delivery of paper originals does not move it.
Settle notarization, witnessing, and recording before signing, and assign the cost and the deadline for each to the party that needs them.

If You’re the Supplier:

You want one repeatable signing process, and proof that an authorized person agreed to the final terms.

Get consent to electronic execution and confirmation of signer authority into the agreement itself, rather than chasing both after performance starts.
Reserve wet ink, notarization, acknowledgment, or recording only where law, a registry, or a lender requires it, so the default path stays electronic.
Where an original, certified copy, or notarized counterpart is required, set the deadline, the delivery method, and who pays, rather than leaving “originals to follow” open.
Keep the execution language aligned with the counterparts, notices, amendment, and order-of-precedence provisions, so the signature method does not contradict the rest of the agreement.
Preserve the audit trail your signing system produces, covering identity, authority, consent, and delivery, and pair it with the waiver of authenticity objections the examples above use.

Red Flags

Silence on electronic signature sends the question to background law, and leaves the counterparty's signing policy or a registry's filing rules free to demand ink at the worst moment. Say which formats bind.
A clause treats ESIGN as sufficient authority to e-sign every document. Section 7003 excludes specified records from Section 7001's protections. Check the governing law for the permitted execution and delivery methods.
A US-style equivalence clause overlooks mandatory foreign execution or filing requirements. Confirm the required form with local counsel, including whether the receiving register requires electronic submission.
Signature format and notarization are separate questions. Permission to sign electronically says nothing about whether a notary can act remotely, which turns on the state's remote online notarization statute.
“Originals to follow” language with no owner and no deadline creates an obligation nobody tracks. Name the party, the count, the address, and the date, or cut the sentence.
Section 7021 covers qualifying electronic notes relating to loans secured by real property and requires the issuer's express agreement to transferable-record status; establishing control requires a reliable system. A promissory note needs its own execution analysis, apart from the master agreement's counterparts clause.

Wet Signature FAQs

Is a wet signature more legally binding than an electronic signature?

A wet signature is not automatically more legally binding. In a covered transaction, a valid electronic signature can have the same legal effect as a wet signature, but the result depends on the agreement, governing law, transaction scope, applicable exceptions, and any required formalities. 15 U.S.C. § 7001(a) bars denying legal effect, validity, or enforceability solely because a covered signature, contract, or record is electronic. For records excluded by 15 U.S.C. § 7003, the governing law determines permitted signing methods and additional formalities. Evidence is a separate question from validity, because each format produces a different record of who signed and when.

Does a scanned or PDF copy of a wet signature count as an original?

A scan or PDF can be effective as a copy or counterpart when the agreement and receiving party treat it that way, but it is not automatically the legal original. The SoFi lease amendment provides that delivery of an electronic or PDF copy of a party’s original wet-ink signature is fully effective as if the original had been delivered, and the Ceribell license amendment gives an emailed PDF the same effect as physical delivery of the ink-signed paper. For covered transactions, Section 7001(d)(3) allows an electronic record meeting its accuracy and accessibility conditions to satisfy specified legal original-form requirements. Check contractual delivery obligations and the receiving authority’s rules separately.

Does a wet signature have to be notarized?

A wet signature needs notarization only when the applicable law or transaction requirements call for a notarial act. Confirm the instrument's execution requirements separately from the notary's permitted process and the recorder's acceptance rules. Check current operational rules before arranging remote online notarization, including any transition period after a law takes effect.

Can different parties use different signing methods on the same contract?

Yes, when the applicable law and the parties' agreement permit the methods used, and the parties satisfy the requirements for assent, authority, execution, and delivery. The Ceribell patent license amendment does this directly: it lets any party sign "electronic or wet ink" and gives both formats the same effect, with an express waiver of any authenticity challenge based on the absence of an ink signature. ESIGN protects covered transactions against rejection solely because of electronic form. It does not establish that a particular contract satisfies every requirement for enforceability. A clause that stays silent on this point, or that reads as if it assumes one uniform method, leaves the question to the same background-law and counterparty-policy risks described above.

What's the best AI to check signature requirements in a contract?

GC AI reviews execution formalities against the red flags on this page. Playbooks encodes the company position on electronic execution, so a review flags a counterparts clause that stays silent on signature format, a wet-ink follow-up with no owner or deadline, and a clause that treats permission to e-sign as an answer to the notarization question. GC AI for Word runs that check inside the document a lawyer already has open, which is where execution language gets negotiated. Exact Quote returns the verbatim clause text behind each flag, so a reviewer confirms what the counterparts and governing law provisions say before deciding whether an ESIGN section 7003 category or a foreign register changes the answer.

Related Clauses

This content is for informational purposes only and does not constitute legal advice.