A signature stamp is legal wherever the rule for a document accepts a signature made by a device, and the Uniform Commercial Code does that for checks. The IRS lets corporate officers stamp employment tax returns and paid preparers stamp returns they prepare. Medicare generally refuses a stamped signature in medical records, and so do DEA’s rule for paper controlled substance prescriptions, California engineering documents and Utah appraisal reports. This page sets 14 uses side by side, then covers notaries, signers who cannot write, stamp control and ordering.
Engineer Seal Stamps compliance desk. Checked against UCC Articles 1, 3 and 4, IRS Rev. Proc. 2005-39 and form instructions, CMS MLN905364, 21 CFR 1306.05, the Federal Rules of Civil Procedure, and statutes, board rules and notary guidance from Arizona, California, Delaware, Maine, North Carolina, Texas and Utah. Sources read September 2026.
| Use | Is a stamped signature accepted? | Source |
|---|---|---|
| Any writing that must be “signed” under the UCC | Yes, when adopted with intent. The definition turns on the signer’s intent to adopt or accept the writing, not on the tool that made the mark. | UCC § 1-201(b)(37) |
| Checks and other negotiable instruments | Yes. A signature on an instrument may be made by hand or with a device or machine. | UCC § 3-401(b) |
| A bank paying a stamped check from your account | Only if you authorized the item and it fits your agreement with the bank. That agreement can vary Article 4’s terms. | UCC § 4-401(a); § 4-103(a) |
| Delaware public officers’ checks, warrants and bonds | Yes, once the officer files a manual signature, certified under oath, with the Secretary of State. A public security still carries at least one hand signature. | 29 Del. C. §§ 5401, 5402 |
| IRS employment tax returns: Form 94X series, 1042, 8027 and CT-1 | Yes, for corporate officers and duly authorized agents, backed by a retained letter that adopts the facsimile and lists each return. | Rev. Proc. 2005-39; Instructions for Form 941 |
| A paid preparer’s own signature on a return | Yes. Rubber stamp, mechanical device or software, on original returns, amended returns and extension requests. | Notice 2004-54; Instructions for Form 1120-REIT |
| Form 8879, IRS e-file signature authorization | Split. The ERO may stamp; the taxpayer signs by hand, or electronically where the software supports it. | Form 8879 |
| Medicare medical record entries | Generally no. A rubber stamp is allowed only for an author with a physical disability who gives proof of being unable to sign. | CMS MLN905364; Program Integrity Manual ch. 3, § 3.3.2.4 |
| Paper prescription for a controlled substance | No. The practitioner signs manually, and that includes a prescription printed from a computer or faxed. | 21 CFR 1306.05(d) |
| Federal civil court papers | Not addressed. An attorney of record signs in the attorney’s own name, and an authorized e-filing with the name on the signature block counts as the signature. | Fed. R. Civ. P. 11(a); 5(d)(3)(C) |
| A North Carolina notary’s own signature on a paper certificate | No. The notary signs by hand in ink and may not sign with a facsimile stamp. | N.C. Gen. Stat. § 10B-35 |
| California engineering and land surveying documents | No for the signature, yes for the seal. A rubber stamp of the signature is prohibited; an electronic signature is allowed. | Cal. Code Regs. tit. 16, § 411(e), (f) |
| Utah real estate appraisal reports | No. Signing a report with a signature stamp is listed as unprofessional conduct. | Utah Admin. Code R162-2g-502b(1)(c) |
| Maine voter registration, for an applicant with a physical disability | Yes, supported by an alternative registration signature statement on the Secretary of State’s form. | 21-A M.R.S. § 153-A |
What makes a stamped signature a legal signature?
Intent does. The Uniform Commercial Code defines signed as using any symbol a person executes or adopts with present intention to adopt or accept a writing, so the test is whether you meant the impression as your signature, not which tool left it.
The neighboring definitions point the same way. Under the same section, a writing includes printing and any other intentional reduction to tangible form, and Article 3 says a signature on an instrument can be made manually or by a device or machine.
The Code has limits, though. Article 1 applies to a transaction only to the extent another article of the Code governs it, so a tax return, a medical record or a sealed drawing answers to its own rule. Those rules follow below.
Are signature stamps legal for checks?
Yes. UCC § 3-401(b) lets the signature on a check be made by hand or by a device or machine, using any name, including a trade or assumed name, or any word, mark or symbol adopted with present intention to authenticate the writing.
Whether your bank pays the check is a separate question. Under § 4-401(a), an item is properly payable only when you authorized it and it follows any agreement between you and the bank, and § 4-103(a) lets that agreement vary Article 4. Your account agreement with the bank is the document that sets those terms.
Some statutes add conditions of their own. Delaware lets an authorized officer sign checks, warrants and other instruments of payment by facsimile signature, defined as a reproduction of the manual signature by engraving, imprinting or stamping, once a certified manual signature is on file with the Secretary of State. For a Delaware corporation, 8 Del. C. § 158 allows any or all signatures on a stock certificate to be facsimiles.
Endorsing a check on the back is a different job, done with an endorsement stamp. The blank, special and restrictive forms are set out in our guide to For Deposit Only stamps.
Which IRS forms accept a stamped signature?
Only forms that published IRS guidance names. Corporate officers and authorized agents may stamp employment tax returns, paid preparers may stamp their own signature on returns they prepare, and an ERO may stamp Form 8879. IRS Chief Counsel has said alternatives stop where published guidance stops.
Employment tax returns. Rev. Proc. 2005-39 covers the Form 94X series, including Forms 940 and 941, along with Forms 1042, 8027 and CT-1, and a facsimile there means a rubber stamp, a mechanical device or a software program. The March 2026 instructions for Form 941 still point to that procedure.
The procedure calls for a letter, signed by the authorized officer or agent under penalties of perjury, that adopts the facsimile and names each return with its identifying number. The letter is kept for at least four years after the due date.
Preparers and EROs. Notice 2004-54 lets paid preparers sign original returns, amended returns and extension requests by rubber stamp, by a mechanical device such as a signature pen, or by software, and current instructions such as those for Form 1120-REIT carry the same permission for original and amended returns. Form 8879 extends the same choice to the ERO, but the taxpayer signs that form by hand or with an electronic signature the software supports.
Everything else. In memorandum PMTA 2013-26, IRS Chief Counsel concluded that Form 8453-EMP may not carry a facsimile signature because no published guidance allows one. The memo describes a facsimile as a signature made by rubber stamp, a mechanical device such as a signature pen, or a software program.
Does Medicare accept a stamped signature in medical records?
As a rule, no. CMS says it does not usually accept stamped signatures, and under the Rehabilitation Act of 1973 it allows a rubber stamp only when the author has a physical disability and can prove that the disability prevents signing.
That position comes from the CMS booklet Complying with Medicare Signature Requirements (MLN905364, July 2025), which cites chapter 3, § 3.3.2.4 of the Medicare Program Integrity Manual. The booklet recognizes a handwritten mark by the ordering or prescribing practitioner and an electronic signature from a system protected against modification.
For a signature missing from a record other than an order, the booklet describes an attestation statement. It also describes a signature log: a typed list of practitioners’ names, each paired with that person’s handwritten signature.
Can a prescriber stamp a controlled substance prescription?
No. Under DEA’s rule at 21 CFR 1306.05(d), a paper prescription for a controlled substance carries the practitioner’s manual signature, and one generated by computer and then printed or faxed needs a manual signature as well.
The rule leaves room on form. A practitioner may sign a paper prescription the way they sign a check or legal document, so J.H. Smith and John H. Smith both work. Electronic prescriptions follow subsection (e), which requires an application that meets part 1311.
Can a lawyer stamp a signature on court filings?
Neither Federal Civil Rule 11(a) nor Rule 5(d)(3)(C) mentions a stamp. Rule 11(a) requires each pleading, written motion and other paper to bear the signature of at least one attorney of record, in that attorney’s name, and an unsigned paper is struck unless promptly corrected.
For electronic filing, Rule 5(d)(3)(C) treats a filing made through a person’s own e-filing account, authorized by that person and paired with the name on a signature block, as that person’s signature.
Law offices use stamps for exhibits, redactions, privilege claims and legal mail, and each of those marks has its own rule. They are covered in our law office stamps guide.
Can a notary use a signature stamp?
Not for the notary’s own signature in North Carolina. G.S. 10B-35 requires the notary to sign a paper notarial certificate by hand in ink, and bars signing a paper record with a facsimile stamp or any electronic or other printing method.
The signer is a different matter. The Texas Secretary of State’s notary FAQ says the person signing an instrument may sign in whatever manner they choose, and that the manner of signing is not the responsibility of the notary.
A notary’s official seal is a separate device from any signature stamp. North Carolina has the notary keep it as the notary’s exclusive property in a secure location (G.S. 10B-36(a)). Required wording, size and ink for each state’s seal are compared in our notary seal requirements by state.
Can engineers, architects and appraisers stamp their signature beside the seal?
Not in California or Utah. California’s engineering and land surveying rule prohibits a rubber stamp of the signature while accepting a stamped seal, and Utah lists a stamped signature on an appraisal report as unprofessional conduct.
California’s rule, 16 CCR § 411, lets the signature be applied electronically under subsection (e). Subsection (f) bars a rubber stamp of the signature, preprinted blank forms carrying the seal or signature, and decals of either. The Board’s guide for city and county officials says a rubber stamp for the seal is acceptable and that local agencies may adopt ordinances or regulations requiring wet stamps or signatures, so the agency receiving the plans can set a stricter rule.
Utah’s appraiser rule, R162-2g-502b, lists affixing a signature to an appraisal report with a signature stamp among its unprofessional conduct items, alongside signing a blank or partly completed report that someone else will finish.
Engineering and architecture boards differ on where the signature sits relative to the seal and on whether wet ink is required. The rule for each of the 54 jurisdictions is in our PE stamp requirements by state and architect seal requirements by state.
What if a person cannot sign by hand?
Several laws provide for it. Maine lets a voter with a physical disability use a signature stamp on registration papers, CMS accepts a rubber stamp from a Medicare author who proves a disability, and other statutes accept a mark or a signature written at the signer’s direction.
Maine. Under 21-A M.R.S. § 153-A, an applicant who cannot sign because of a physical disability may use a signature stamp, or authorize another person to sign, to register to vote or to enroll or change registration status. The alternative registration signature statement, on a form the Secretary of State designs, is prepared at the applicant’s direction in front of the applicant and one corroborating witness.
A mark or a designee. Arizona’s general definitions count a mark as a signature for a person who cannot write, with the person’s name written near it and a witness who signs (A.R.S. § 1-215). North Carolina notaries may certify a mark made in their presence, or a signature written by a disinterested designee before the principal, the notary and two witnesses (G.S. 10B-20(d), (e)).
Wills. Arizona accepts a will signed in the testator’s name by another individual, in the testator’s conscious presence and at the testator’s direction (A.R.S. § 14-2502). The Arizona and North Carolina provisions speak of a mark or a proxy signer, not a stamp.
Who is responsible when someone else uses your stamp?
An unauthorized stamped signature generally does not bind you on a check, but UCC § 3-406 can stop you from asserting the forgery against a good faith payer when your failure to use ordinary care substantially contributed to it.
Section 3-403(a) treats an unauthorized signature as ineffective except as the signature of whoever made it, in favor of a person who pays or takes the instrument in good faith, and it can be ratified. An authorized one binds you: under § 3-402(a), when a representative signs your name, you are bound to the same extent as on a simple contract.
Statutes can add penalties. In Delaware’s chapter on public officers’ facsimile signatures, unlawful use of a facsimile signature is a felony carrying the sanctions for forgery (29 Del. C. § 5404).
None of the rules cited here prescribes how a signature stamp is stored, so what follows is office practice, not law. An office that uses one can name a single holder, lock the stamp away between uses, and log the date, document and user for each impression. The Rev. Proc. 2005-39 letter is one place where a written record is required.
Where can you order a custom signature stamp for office paperwork?
Engineer Seal Stamps engraves custom signature stamps from the signature image you upload, in self-inking and pre-inked models, each in small, medium and large sizes, and its sister store Acorn Sales (acornsales.com) makes them on a wood handle, self-inking or slim pre-inked.
- Your signature, not a font. An ESS signature stamp die is produced from the signature image you upload.
- Self-inking for volume. The ESS self-inking signature stamp inks itself between presses, in a choice of 11 ink colors.
- Pre-inked for a quiet press. The ESS pre-inked signature stamp presses quietly, with its oil-based ink held inside the stamp.
- Check the document first. Checks (UCC § 3-401(b)) and IRS employment tax returns under Rev. Proc. 2005-39 accept a stamped signature, while Medicare generally does not (CMS MLN905364).
What do you need to order a signature stamp?
A clean image of your signature. ESS makes signature stamps in self-inking and pre-inked models, each in small, medium and large sizes, and the die is produced from the signature image you upload with the order.
ESS artwork guidelines rank vector files (AI, EPS, CDR and PDF) as best and PNG, JPG or TIF at 300 dpi or higher as better. Black on white with no shading or halftones makes good artwork; color, backgrounds, phone photos and faxed images make poor artwork. Our custom logo stamp page compares the stamp types an artwork order can use.
The self-inking signature stamp inks itself between presses and comes in 11 ink colors. The pre-inked signature stamp holds oil-based ink inside the stamp and presses quietly.
Frequently asked questions
Is an electronic signature treated the same as a stamped one?
Not always. California’s engineering rule allows an electronic signature but prohibits a rubber stamp of the signature, and Form 8879 lets a taxpayer sign electronically but not by stamp. Each rule names the methods it accepts.
Can an employee apply my signature stamp for me?
Under UCC § 3-402(a), a representative who signs your name on an instrument binds you as a signature on a simple contract would, and Rev. Proc. 2005-39 lets duly authorized agents sign employment tax returns by facsimile. Other rules are personal: a North Carolina notary signs by hand, and a Utah appraiser may not stamp a signature onto an appraisal report.
May a tax preparer stamp the client’s signature line?
The IRS guidance above covers the preparer’s own signature. On Form 8879 the taxpayer signs by hand or with a software supported electronic signature, and Chief Counsel limits facsimile signatures to forms where published guidance allows them.
Is a Delaware stock certificate valid if the officer whose facsimile it carries has left?
Yes. Under 8 Del. C. § 158, a certificate signed by an officer, transfer agent or registrar, or carrying that person’s facsimile, may still be issued with the same effect if the person left the role before issue.
Does the UCC definition of signed cover every document?
No. Article 1 reaches a transaction only as far as another article of the Code governs it. Tax returns, Medicare records, prescriptions and sealed plans follow the IRS, CMS, DEA and board rules in the table.
What does a North Carolina notary write for a signature by mark?
Below the mark, the notary writes that the mark was affixed by the named signer in the presence of the undersigned notary, then completes the notarization. The mark itself has to be made in front of the notary (G.S. 10B-20(d)).
Is a pre-inked rubber signature stamp good for quick approvals?
A pre-inked rubber signature stamp suits quick approvals because it carries its own ink, so one press signs the page. Engineer Seal Stamps makes it in small, medium and large sizes from your uploaded signature, and its sister store Acorn Sales sells a slim pre-inked signature stamp.
When you have confirmed that the documents you plan to sign accept a stamped signature, order one made from your own signature artwork in our custom stamps collection.
