Are electronic signatures legally binding? ESIGN, UETA and eIDAS explained
Yes, in the US, UK, EU and most countries. What the ESIGN Act, UETA and eIDAS require, which documents are excluded, and how to make e-signatures hold up.
If you're about to send a contract, lease, NDA or offer letter for e-signature, the first question is usually whether it will actually count. For most documents, in most countries, the answer is a clear yes. This guide covers the laws that make that true, what they require of you, and the short list of exceptions.
United States: the ESIGN Act and UETA
Two laws work together in the US.
- The ESIGN Act (Electronic Signatures in Global and National Commerce Act, 15 U.S.C. § 7001 and following) was signed in June 2000. It says that a signature, contract or record relating to a transaction in interstate or foreign commerce "may not be denied legal effect, validity, or enforceability solely because it is in electronic form."
- UETA (the Uniform Electronic Transactions Act, 1999) is a model law that nearly every state has adopted. It applies the same principle to transactions governed by state law. New York, which hasn't adopted UETA, has its own Electronic Signatures and Records Act with a similar effect.
Both laws define an electronic signature broadly: 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. A typed name, a drawn signature, a checkbox click or an uploaded image of your signature can all qualify.
The four things you need to be able to show
The laws don't prescribe a technology. Enforceability comes down to evidence. If a signature is ever challenged, you want to be able to show:
- Intent to sign. The signer took a deliberate action, such as clicking "Sign" after adopting a signature, that clearly meant agreement.
- Consent to do business electronically. Every party agreed to use electronic records. For consumers, ESIGN requires a specific disclosure (covering the right to paper copies, how to withdraw consent, and hardware and software requirements) when another law requires the information to be given in writing.
- Association of the signature with the record. The signature is tied to the exact document that was signed, and you can show it hasn't changed since.
- Record retention. You can keep and accurately reproduce the signed record for everyone entitled to it.
This is why a good e-signature platform does more than stamp an image on a PDF. Parapho, for example, shows every signer an ESIGN/UETA consumer disclosure and records their consent, logs each view and signature with a timestamp, IP address and device, and seals the finished document with a certificate of completion, a PDF digital signature and a SHA-256 fingerprint.
What ESIGN excludes
Section 7003 of ESIGN lists documents it doesn't cover. Some states also carve these out of UETA:
- Wills, codicils and testamentary trusts
- Adoption, divorce and other family-law matters
- Court orders, notices and official court documents such as pleadings
- Notices of cancellation or termination of utility services
- Notices of default, acceleration, repossession, foreclosure or eviction relating to a primary residence
- Notices of cancellation of health or life insurance
- Product recall notices that affect health or safety
- Documents required to accompany the transport of hazardous materials
Separate rules also apply to things like notarization (many states now allow remote online notarization under their own statutes) and to negotiable instruments such as promissory notes intended to be transferred.
European Union: eIDAS
In the EU, the eIDAS Regulation (Regulation (EU) No 910/2014, updated by Regulation (EU) 2024/1183) applies directly in every member state. Article 25 says an electronic signature can't be denied legal effect or admissibility as evidence just because it's electronic. eIDAS defines three levels:
| Level | What it is | Typical use |
|---|---|---|
| Simple (SES) | Any electronic data used to sign, such as a typed or drawn signature with an audit trail | Most commercial contracts, NDAs, sales and service agreements, HR forms |
| Advanced (AdES) | Uniquely linked to the signer, capable of identifying them, under their sole control, and detects later changes | Higher-value or regulated agreements |
| Qualified (QES) | An advanced signature made with a qualified device and a qualified certificate from a trust service provider | Where national law demands the equivalent of a handwritten signature |
Only a qualified signature is automatically treated as equivalent to a handwritten one across the EU. Simple and advanced signatures are still valid and admissible, and the vast majority of business contracts don't need anything more than a simple signature with strong evidence behind it. Check national law for specific document types, such as some real estate transfers and employment terms, that may require a qualified signature or a notary.
United Kingdom
Section 7 of the Electronic Communications Act 2000 makes electronic signatures admissible as evidence, and the UK kept the eIDAS framework after Brexit. In 2019 the Law Commission confirmed that an electronic signature is capable in law of validly executing a document, including a deed, as long as the signer intends to authenticate it and any formalities are met. For deeds, that still means a witness who is physically present when the signer signs.
Elsewhere
Most major economies have similar laws, including Canada (PIPEDA and provincial electronic commerce acts), Australia (the Electronic Transactions Act 1999) and India (the Information Technology Act 2000), each with its own exclusions. If you're signing across borders, the safest approach is the same everywhere: get clear consent, capture intent, keep a complete audit trail and store a tamper-evident final copy.
A practical checklist
- Confirm the document type isn't on an exclusion list where you and the signer are.
- Use a tool that records each signer's consent to sign electronically before they sign.
- Verify who's signing in proportion to the risk: a unique email link for routine documents, plus an access code shared by phone for sensitive ones.
- Use a witness when the document requires one.
- Make sure the final PDF carries a certificate of completion and can be checked for tampering.
- Send everyone a copy and keep yours for as long as the underlying agreement requires.
Parapho does all of this on every plan, including the free one. You can send your first envelope free, or sign your own PDF in the browser without an account.
Frequently asked questions
Is a typed name a legal signature?
Usually, yes. Under ESIGN and UETA an electronic signature is any sound, symbol or process attached to a record and adopted with intent to sign. A typed name, a drawn signature or a click can all qualify. What makes it enforceable is the evidence of intent and consent around it, not how it looks.
Do I need the other party's consent to sign electronically?
Both parties must agree to do business electronically. For consumers in the US, ESIGN adds specific disclosure and consent steps when a law requires information to be given in writing. A good e-signature tool shows a consent disclosure and records the signer's agreement before they sign.
Which documents can't be signed electronically in the US?
ESIGN excludes wills, codicils and testamentary trusts; adoption, divorce and other family-law matters; court orders and official court documents; notices of utility shut-off; notices of default, foreclosure or eviction on a primary residence; cancellation of health or life insurance; product recall notices; and documents that must accompany hazardous materials. State law can add or relax requirements.
What is the difference between a simple, advanced and qualified electronic signature?
These are eIDAS levels. A simple electronic signature (SES) is any electronic data used to sign. An advanced signature (AdES) is uniquely linked to and capable of identifying the signer, under their sole control, and detects later changes. A qualified signature (QES) is an advanced signature made with a qualified device and certificate from a trust service provider; it has the same effect as a handwritten signature across the EU.
Will an e-signed contract hold up in court?
Courts in the US, UK and EU routinely enforce electronically signed contracts. Disputes are usually about who signed and whether the document changed afterwards, so keep the audit trail, the signer's consent record and a sealed final copy.
This article is general information, not legal advice. Rules differ by country, state and document type; check with a lawyer for anything high-stakes.