Are electronic signatures legally binding? What makes one hold up
The law mostly settled whether e-signatures count years ago. The question that decides a dispute today is whether you can prove who signed, what they saw and that nothing changed afterwards.
Nothing here is legal advice. Whether a particular signature holds up depends on the jurisdiction, the type of document and how the signing was carried out, and a lawyer who knows all three is the person to ask about a specific agreement.
The short version
In the United States, the federal ESIGN Act and the state-level Uniform Electronic Transactions Act (UETA) both say the same basic thing: a signature, contract or record is not denied legal effect solely because it is electronic. In the EU, eIDAS says an electronic signature cannot be refused as evidence solely because it is electronic, and gives one tier — the qualified electronic signature — the same effect as a handwritten one.
That word solely carries the weight. The law removes the objection that a signature is electronic. It does not remove any other objection. A person can still say they never signed, that they were shown a different document, or that the document was changed afterwards, and those arguments are decided on evidence.
The four things that make an e-signature hold up
| Element | What it means | What proves it |
|---|
|---|---|---|
| Intent to sign | The person meant to sign, not just to view or acknowledge | A clear signing action, with wording that says what signing means |
|---|---|---|
| Attribution | The signature was the act of the person it names | Delivery to a specific address, a single-use link, any identity check and its result |
| Record integrity and retention | The signed record is accurate and can be reproduced later | A sealed final document with a hash, and a copy every party can keep |
If any row is weak, that is where a dispute starts. Attribution is the most common battleground: "that was not me" is a stronger defence than "electronic signatures don't count", because it is a question of fact rather than of law.
Where it usually goes wrong
Consent inferred, not recorded. For consumer transactions, ESIGN expects consent to receive records electronically, after specific disclosures. A system that treats "they signed, so they consented" as consent has skipped the step that is most often challenged.
A shared or forwarded link. If anyone holding the email can sign, the record proves that somebody with access to an inbox clicked. For higher-stakes documents, add a check the named person can pass and a forwarder cannot, such as a passcode sent separately.
No record of what the signer saw. A signature on page 7 of a document proves little if the record cannot show that page 7 said the same thing when they signed it.
Evidence that lives only with the vendor. If the proof is a web page on a vendor's site, it lasts as long as the vendor's account does. Evidence you can keep and verify yourself is worth more on the day it is needed.
Documents that need more than a simple e-signature
Some documents fall outside ESIGN and UETA entirely — most wills, many family-law documents, court papers and certain consumer notices. Others are inside the law but carry formal requirements such as witnessing, notarisation or a qualified signature in the EU. See the guide on documents you cannot sign electronically before using an e-signature for anything in those categories.
A test you can run on your own process
- Could you show, without asking your vendor, who was invited to sign and how they proved it was them?
- Could you show the exact document they saw, and that it has not changed since?
- Is consent to transact electronically recorded as a separate step?
- Does every party hold a copy of the signed document and its evidence?
If you can answer yes to all four, a signature dispute becomes an argument about facts you can prove. That is the whole point of doing it electronically.
Pactlyra records consent, delivery and every identity check as separate, timestamped events, seals the finished document, and gives every party an evidence package that verifies offline. Evidence and verification are free on every plan, including the free one.
Last reviewed 2026-09-26. Pactlyra produces a detailed evidence record for every completed document. Electronic signature validity depends on your jurisdiction, the document type, and how the transaction is carried out; nothing here is legal advice.