Is a Scanned Signature Pasted into a PDF Legally Binding?
It can be. If you crop your signature from a piece of paper and paste it into a PDF intending to sign, it fits the legal definition of an electronic signature. But it is the way to sign with the least proof behind it: there is no record of who pasted the image or when, and anyone who has the file can copy it into another document. Here is when it holds up, when to avoid it, and the alternative, which is just as easy and free.
In 30 seconds
- A pasted image of your signature can be an electronic signature (ESIGN/UETA) if you placed it with the intent to sign.
- It is the hardest to prove: there is no record of who pasted it or when, and it can be copied in two clicks.
- For contracts and agreements, sign with an audit trail: date, time, IP address, email and the document’s hash.
What the law says
The federal ESIGN Act and each state’s UETA define an electronic signature as, in UETA’s words, “an electronic sound, symbol, or process, attached to or logically associated with a record and executed or adopted by a person with the intent to sign the record.” An image of your handwritten signature is a symbol; if you pasted it yourself intending to sign that document, it is an electronic signature, and the law says it cannot be denied legal effect just because it is electronic. So far, so good.
“A signature, contract, or other record relating to such transaction may not be denied legal effect, validity, or enforceability solely because it is in electronic form.”
ESIGN Act, 15 U.S.C. § 7001(a)(1) · Official source
Official figures
of ESIGN: an electronic signature is any symbol adopted with the intent to sign, including an image.
of UETA: a signature is attributed to the person who made it, and you must be able to show that.
The problem: proof
UETA (§ 9) attributes a signature to a person “if it was the act of the person,” and you have to be able to show that. With a pasted image there is no record of who pasted it, when, or from where; anyone with access to a PDF you signed can crop it and drop it into another one. If the other party denies signing, all you have is the drawing. California courts have made clear that is not enough: in Ruiz v. Moss Bros. Auto Group, Inc., 232 Cal. App. 4th 836 (2014), and Fabian v. Renovate America, Inc., 42 Cal. App. 5th 1062 (2019), they rejected electronic signatures because the company could not explain how they had been placed; in Espejo v. Southern California Permanente Medical Group, 246 Cal. App. 4th 1047 (2016), they accepted one because the company could, with the user name, date, time and IP address.
When a scanned signature is enough
- Your own documents that nobody is going to dispute: an internal form, a letter, an application.
- Documents where the other party already knows it is you and confirms it through another channel (a reply email, a payment).
- As a visual element inside a process that does record the signature (some platforms let you upload your image and attach it to the audit trail).
When to avoid it
- Contracts with money on the line, leases, sales agreements, deals with people you do not know.
- Any document that could end up in a dispute: you will not be able to prove who placed it.
- Documents the law requires to be signed in a specific way or before a notary.
And one precaution: do not send your scanned signature as a standalone file or leave it in public PDFs. It is an image that can be copied in two clicks.
The alternative, just as easy
- Open Sign for free and upload the PDF (or a photo of the paper).
- Sign with your finger or mouse, or if someone else is signing, mark where they sign and send them the link by email, text or WhatsApp.
- The PDF comes back with a certificate of completion: date and time, SHA-256 fingerprint of the document and, if someone else signed, the email or phone number the link was sent to, their IP address, device and browser and a unique signer code. The signature is tied to that record, not floating loose.
More on the law and the cases in are electronic signatures valid in the United States?; on typing your name, in does a typed name count as a signature?
This is general information, not legal advice. For your specific situation, ask a lawyer licensed in your state.
FAQs
Is it legal to paste an image of my signature into a PDF?
Yes, if you do it yourself with the intent to sign: it fits the definition of an electronic signature under ESIGN and UETA. What you do not have is proof of who pasted it or when.
Can someone dispute a scanned signature?
Yes, and it is easy: they just deny placing it. Then you have to prove it was “the act of the person,” and a standalone image does not prove that.
How is signing in MultiDocs different?
The signature image is tied to an audit trail: who the link was sent to, which IP address opened it, when it was signed and the document’s hash. That is what courts have asked for.
What if someone sends me a PDF with their scanned signature?
Keep the email they sent it with: the context (who sent it, when) is part of the proof. For important contracts, ask them to sign through a link with an audit trail.
Does a scanned signature work for a notary or a public registry?
No. Anything that requires a notary or goes into a public registry follows its own rules; a pasted image does not meet them.
Official sources
- Cornell LII: 15 U.S.C. § 7001 (ESIGN Act, general rule of validity and consumer consent)
- Cornell LII: 15 U.S.C. § 7006 (definitions: electronic signature, consumer)
- California Legislative Information: Civil Code § 1633.9 (attribution)
- Uniform Law Commission: Electronic Transactions Act (UETA, 1999)
We checked each source on November 6, 2026. If you spot something out of date, write to us at info@multidocs.es.