Electronic signature law
Are electronic signatures legally binding?
In the United States, yes. The federal ESIGN Act of 2000 and the Uniform Electronic Transactions Act give an electronic signature the same legal effect as a handwritten one, for almost every kind of business and consumer agreement. Neither law names a technology. Both set conditions, and a handful of document types are carved out entirely. Here is what that means in practice.
In one paragraph
An electronic signature is legally binding in the United States when the signer intended to sign, both parties agreed to transact electronically, the signature is logically associated with the record it signs, and that record can be retained and accurately reproduced by everyone entitled to a copy. The ESIGN Act excludes certain documents outright, including wills, family law matters, and court orders. What decides a dispute is usually not the mark itself but the evidence behind it.
The two laws
ESIGN and UETA
The ESIGN Act (2000)
15 U.S.C. ch. 96
Federal law, applying to transactions in or affecting interstate or foreign commerce. Its core provision is negative rather than prescriptive: a signature, contract, or record may not be denied legal effect, validity, or enforceability solely because it is electronic, or because an electronic signature was used in its formation. It adds consumer disclosure requirements, and it lists the categories of document it does not cover.
UETA (1999)
Uniform state law
A uniform act drafted for adoption by the states, doing at state level what ESIGN does federally. It has been adopted in nearly every state, and where a state has adopted it, it generally governs in place of ESIGN. New York has not adopted UETA and instead has its own Electronic Signatures and Records Act, which reaches the same result.
What the law requires
Four conditions, and how this product meets them
- 01
Intent to sign
The signer must mean to sign. A signature applied by accident, or without the signer knowing what they were agreeing to, is no more valid electronically than on paper.
In O2A2 E-sign
A signer draws or types their signature into a field that is labelled as a signature, on a document displayed in full, and then presses a button that completes the agreement. Nothing signs on their behalf and nothing is pre-filled.
- 02
Consent to do business electronically
Both parties must agree to transact electronically. In consumer transactions ESIGN adds specific disclosure requirements before that consent counts.
In O2A2 E-sign
Every signer is shown the Electronic Signature Disclosure before they can sign, and the moment they agree is written to the audit trail with a timestamp, IP address, and device.
- 03
Association with the record
The signature must be attached to, or logically associated with, the record being signed. A signature floating free of its document proves nothing.
In O2A2 E-sign
Each signature is bound to a specific field, on a specific page, of a specific document, and stamped into that PDF. Every page of the executed file carries the envelope id and the document's SHA-256 hash in its footer.
- 04
Retention and accurate reproduction
The record must be capable of being retained and accurately reproduced by everyone entitled to it. A system that cannot give a party a usable copy fails this.
In O2A2 E-sign
Both sides keep a copy. You can download the executed PDF whenever you like, and your counterparty can request a secure link from the client portal to fetch anything they signed.
The carve-outs
What you cannot sign electronically
The ESIGN Act excludes these categories by statute, at 15 U.S.C. section 7003. Most of them involve a notice whose consequences are severe enough that Congress wanted it on paper. Individual states and individual counterparties can add requirements of their own, such as notarization or a witness.
- Wills, codicils, and testamentary trusts
- Adoption, divorce, and other matters of family law
- Court orders, notices, and official court documents
- Notices of cancellation or termination of utility services
- Notices of default, foreclosure, eviction, or repossession of a primary residence
- Notices of cancellation or termination of health or life insurance benefits
- Product recalls and notices of material failure of a product
- Documents required to accompany the transport of hazardous materials
- Most of the Uniform Commercial Code, other than sections 1-107 and 1-206 and Articles 2 and 2A
What actually decides a dispute
Validity is a question about evidence
Arguments about electronic signatures are almost never about whether the law permits them. They are about whether the party relying on the signature can show what happened: that this person saw this document, agreed to sign it electronically, applied their signature on a particular date, and that the copy now being produced is the copy they signed.
That is the part software can either do or fail to do, and it is what O2A2 E-sign was built around. Every view, signature, and decline is written to an append-only audit log that a database trigger prevents anything from editing or deleting, recorded with the time, IP address, device, and timezone. A certificate of completion summarising all of it is attached to the executed document. And the document's SHA-256 hash is stamped into the footer of every page, so a copy produced years later can be checked against the record rather than taken on trust.
Questions
Common questions about electronic signature law
- Are electronic signatures legally binding in the United States?
- Yes, for the great majority of business and consumer agreements. The federal Electronic Signatures in Global and National Commerce Act, known as the ESIGN Act, took effect in 2000 and provides that a signature, contract, or other record may not be denied legal effect, validity, or enforceability solely because it is in electronic form. The Uniform Electronic Transactions Act, a 1999 uniform state law, does the same at state level and has been adopted in nearly every state; New York instead has its own Electronic Signatures and Records Act. Neither law requires a particular technology.
- What makes an electronic signature valid?
- Four things. The signer must intend to sign. Both parties must consent to doing business electronically, with specific disclosures first in consumer transactions. The signature must be attached to or logically associated with the record it signs. And the record must be capable of being retained and accurately reproduced by everyone entitled to a copy. A signature that satisfies all four has the same legal effect as ink on paper.
- Which documents cannot be signed electronically?
- The ESIGN Act excludes several categories by statute in 15 U.S.C. section 7003. They include wills, codicils, and testamentary trusts; adoption, divorce, and other family law matters; court orders and official court documents; notices cancelling utility service; notices of default, foreclosure, eviction, or repossession of a primary residence; notices cancelling health or life insurance benefits; product recall notices; documents that must accompany hazardous materials in transport; and most of the Uniform Commercial Code. Some states and some counterparties impose further requirements, such as notarization.
- Is a typed name a valid signature?
- It can be. Neither the ESIGN Act nor UETA specifies a form, so a typed name, a drawn mark, or a click can all constitute a signature as long as it is executed with intent to sign and is logically associated with the record. What decides a dispute is rarely the appearance of the mark. It is the evidence behind it: who applied it, when, from where, and whether the document has changed since.
- What evidence should an electronic signature have behind it?
- Enough to reconstruct what happened without relying on the vendor's word. That means a record of when each party opened the document and when they signed, the IP address and device that did it, proof that the signer consented to sign electronically, and a way to show the document has not changed since. O2A2 E-sign records all of these in an append-only audit log enforced by a database trigger, summarises them in a certificate of completion attached to the executed document, and stamps the document's SHA-256 hash into the footer of every page so any copy can be checked against the record.
- Does an electronic signature need a witness or a notary?
- Not as a matter of federal electronic signature law. ESIGN and UETA govern whether an electronic signature counts as a signature, not whether a particular document needs witnessing. If the underlying transaction requires notarization or witnesses on paper, it still requires them electronically, and the rules for remote online notarization vary by state. O2A2 E-sign does not provide notarization.
- Are electronic signatures valid outside the United States?
- Most developed jurisdictions recognise them, but under different frameworks. The European Union regulates them under eIDAS, which distinguishes simple, advanced, and qualified electronic signatures, with qualified signatures requiring a certificate from a trust service provider. The United Kingdom, Canada, Australia, and many others have their own statutes. O2A2 E-sign is built around the ESIGN Act and UETA and does not issue qualified signatures under eIDAS. For a cross-border agreement that needs one, use a provider that offers it.
This page describes the law in general terms so you can decide what to look into further. It is not legal advice, we are not a law firm, and whether a particular document is enforceable depends on facts we cannot see. For anything consequential, ask a lawyer in your state.
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