The ESIGN Act, explained

The Electronic Signatures in Global and National Commerce Act — almost always called the ESIGN Act — is the U.S. federal statute that made electronic signatures and records enforceable nationwide. Congress passed it in 2000, and it took effect on October 1 of that year. It is codified at 15 U.S.C. §§ 7001–7031.

Before ESIGN, the enforceability of an electronic signature depended on a patchwork of state law, and much of that patchwork was uncertain. ESIGN's purpose was to remove that uncertainty for interstate commerce: if a signature or record meets the federal standard, it cannot be denied legal effect simply because it is electronic.

The core rule

The central provision is short and broad. A signature, contract, or other record relating to a transaction in or affecting interstate or foreign commerce may not be denied legal effect, validity, or enforceability solely because it is in electronic form. Nor may a contract be denied effect solely because an electronic signature or electronic record was used in its formation.

That "solely because" phrasing is important. ESIGN removes the electronic form as a ground for invalidity. It does not rescue an agreement that fails for an unrelated reason — lack of consideration, fraud, incapacity, or a violation of some other statute.

What ESIGN requires of your process

Intent to sign. The signature must be executed or adopted by a person with the intent to sign the record.
Consumer consent and disclosure. Where a consumer must receive legally required information in writing, the business must first obtain the consumer's electronic consent, using a disclosure that states whether consent is required, the scope of the consent, and the hardware and software needed to access and retain the records. The consumer must also be told how to withdraw consent and how to request a paper copy.
Association with the record. The signature must be attached to or logically associated with the record.
Retention. Electronic records must be retained accurately and remain accessible to those entitled to them, in a form capable of accurate reproduction.

The consumer-consent requirements of ESIGN apply to consumer transactions. Business- to-business transactions do not carry the same disclosure obligation, but the other requirements — intent, association, retention — still describe what makes a signature defensible.

What ESIGN does not cover

The statute lists categories where it does not apply, including wills, codicils, and testamentary trusts; adoption, divorce, and other family-law matters; court orders and official court documents; notices of cancellation or termination of utility services; default, foreclosure, and eviction notices; cancellation of health or life insurance benefits; product recall notices; and certain hazardous-materials transport documents.

Two caveats. First, states may adopt their own rules for these categories, and some have — remote online notarization in particular has expanded what is possible for real-estate and estate documents. Second, the exclusions apply to the specific document types listed, not to a whole industry.

How ESIGN and state law interact

ESIGN was designed to work alongside state law rather than displace it. It defers to state enactments of the Uniform Electronic Transactions Act, and more generally to state law that does not require or accord greater legal status to a specific technology. In practice, this means a transaction is usually governed by state UETA alongside the federal ESIGN backstop.

That is generally good news: it means you rarely have to choose which law applies. But it also means the state-level exceptions still matter. See UETA and the state-by-state picture.

ESIGN and eIDAS are not the same

ESIGN is a U.S. statute with a permissive, technology-neutral stance. The EU's eIDAS regulation is more prescriptive: it defines tiers of signature and attaches specific legal effects to specific tiers, notably giving a qualified electronic signature the equivalent effect of a handwritten signature across the EU. A process designed for ESIGN compliance does not automatically satisfy eIDAS, and vice versa.

Practical takeaways

For most U.S. commercial contracts, ESIGN plus UETA is sufficient authority — no cryptography required.
Consumer transactions carry an extra, specific disclosure obligation. Do not skip it, and keep the version the consumer actually saw.
Retention is a legal requirement. Design your storage and export before you need it.
Check the excluded categories before assuming a document can be signed electronically.

Not legal advice. This is a general description of a federal statute. Application depends on your transaction, your jurisdiction, and your counterparties.