Are E-Signatures Legally Binding? ESIGN, UETA and eIDAS

Are e-signatures legally binding? In the United States and the European Union, the main statutes say an electronic signature cannot be denied legal effect just because it is electronic. That is a floor, not a guarantee: each law has exceptions, and whether a particular signature holds up still depends on the facts and on other law. This article describes three frameworks, the federal ESIGN Act, the state-level Uniform Electronic Transactions Act and the EU’s eIDAS regulation. It is not legal advice, and it does not tell anyone how to sign a specific document.

The US ESIGN Act

The Electronic Signatures in Global and National Commerce Act, enacted June 30, 2000, is codified at 15 U.S.C. 7001. For transactions in or affecting interstate or foreign commerce, it says a signature, contract or other record “may not be denied legal effect, validity, or enforceability solely because it is in electronic form,” and that a contract may not be denied effect solely because an electronic signature or record was used to form it.

The statute defines an electronic signature broadly as “an electronic sound, symbol, or process, attached to or logically associated with a contract or other record and executed or adopted by a person with the intent to sign the record.” Intent to sign is part of the definition, which is why e-signature platforms record steps such as clicking to adopt a signature.

ESIGN adds conditions for consumers. Where a law requires information to be given to a consumer in writing, section 7001(c) allows electronic delivery only if the consumer has affirmatively consented after receiving specified disclosures, including the right to withdraw consent and the hardware and software needed.

It also lists exceptions. Section 7003 excludes, among others, laws governing wills, codicils and testamentary trusts; adoption, divorce and other family law matters; the Uniform Commercial Code other than a few sections and Articles 2 and 2A; court orders, notices and official court documents; notices of cancellation of utility services; notices of default, foreclosure or eviction involving a primary residence; cancellation of health or life insurance benefits; and product recall notices.

UETA at the State Level

The Uniform Electronic Transactions Act is a model law from the Uniform Law Commission, which publishes its text and tracks state enactments.

ESIGN and UETA are designed to fit together. Under 15 U.S.C. 7002, a state law may modify, limit or supersede ESIGN’s core rule only if it is an enactment of UETA as approved by the Uniform Law Commission in 1999, or if it sets out alternative procedures that are consistent with ESIGN and do not favor one technology. In practice, that means a reader checking a US signature question usually needs to look at both the federal statute and the state’s version of UETA.

eIDAS in the European Union

The EU’s framework is Regulation (EU) No 910/2014, known as eIDAS, which was amended in 2024 by Regulation (EU) 2024/1183 to establish the European Digital Identity Framework. Unlike ESIGN, eIDAS defines three levels of signature.

An electronic signature is data in electronic form attached to or logically associated with other data and used by the signatory to sign. An advanced electronic signature must, under Article 26, be uniquely linked to and capable of identifying the signatory, and be created with data the signatory can use under their sole control. A qualified electronic signature is an advanced signature created by a qualified signature creation device and based on a qualified certificate.

Article 25 sets the legal effects. Any electronic signature “shall not be denied legal effect and admissibility as evidence in legal proceedings solely on the grounds that it is in an electronic form” or that it is not qualified. A qualified electronic signature “shall have the equivalent legal effect of a handwritten signature,” and one issued in one member state is recognized in all others. The regulation’s recitals leave it to national law to define the legal effect of other electronic signatures.

Common Questions

Are electronic signatures legally binding in the US?

ESIGN says a signature or contract may not be denied legal effect solely because it is electronic, for transactions in or affecting interstate or foreign commerce. It lists exceptions, and other law still applies.

What documents cannot be signed electronically under ESIGN?

Section 7003 excludes categories including wills and testamentary trusts, family law matters, court documents and certain consumer notices. State law may add its own rules.

What is a qualified electronic signature?

Under eIDAS, an advanced electronic signature created with a qualified device and based on a qualified certificate. It has the same legal effect as a handwritten signature across the EU.

Is a digital signature the same as an electronic signature?

Not always. ESIGN defines electronic signatures broadly. “Digital signature” usually refers to certificate-based cryptographic signatures, which in the EU map to the advanced and qualified levels.

What to Watch

The EU’s 2024 amendment establishes European Digital Identity Wallets, which may change how qualified signatures are created. In the US, the frameworks have been stable for more than two decades, and the open questions sit in the exceptions and in how courts weigh evidence of intent.