When you sign a contract, NDA, or lease agreement using an app like PrimeDocu, is that signature actually legally binding? The answer in the United States is a clear yes — and the federal law that makes it so is the Electronic Signatures in Global and National Commerce Act, universally known as the ESIGN Act. Signed into law by President Clinton on June 30, 2000, ESIGN fundamentally changed how Americans do business by putting electronic signatures on equal legal footing with handwritten ones. This article explains what the law actually says, what it does not cover, and how it compares to the equivalent frameworks in the European Union and United Kingdom.
What the ESIGN Act says
The core provision of the ESIGN Act is elegant in its simplicity: a signature, contract, or other record relating to a transaction may not be denied legal effect, validity, or enforceability solely because it is in electronic form. In plain terms: a court cannot throw out a contract just because it was signed electronically rather than with a pen.
This applies across interstate and foreign commerce — so it covers the vast majority of business and consumer transactions in the US. The law preempts inconsistent state laws, although it explicitly allows states to enact their own electronic signature laws provided they are consistent with ESIGN or adopt the Uniform Electronic Transactions Act (UETA), which most states have done.
Requirements for a valid electronic signature under ESIGN
For an electronic signature to be legally valid under ESIGN, three requirements must be met:
- Intent to sign: The signer must have affirmatively intended to sign the record. This is why simply receiving a document electronically does not constitute signing it — there must be a deliberate act, such as clicking "I agree," drawing a signature, or typing your name in a signature field.
- Consent to do business electronically: The parties must have agreed to conduct the transaction electronically. This consent does not need to be elaborate — it can be implied by the act of using an electronic signing platform — but it must be present. Businesses that initiate electronic signing must provide information about the right to use paper records and how to withdraw consent.
- Association with the record: The electronic signature must be logically associated with the document being signed. A signature image attached to an unrelated document does not satisfy this requirement. Proper electronic signature platforms attach audit trail metadata to the document to demonstrate this association.
What ESIGN does NOT cover
The ESIGN Act explicitly excludes certain categories of documents, which continue to require traditional wet-ink signatures. The key exclusions are:
- Wills, codicils, and testamentary trusts — estate documents require physical signatures in most jurisdictions, often with witnesses
- Adoption, divorce, and family law court orders — family law matters generally require paper filings in court
- Court orders, notices, and official court documents
- Notices of cancellation or termination of utility services
- Notices of default, acceleration, repossession, foreclosure, or eviction on a primary residence
- Cancellation of health or life insurance benefits
- Product recall notices affecting safety
If you are dealing with any of these document types, you will need a wet-ink signature regardless of how convenient electronic signing would be. When in doubt, confirm with a qualified attorney in your state.
The EU equivalent — eIDAS
The European Union's equivalent of ESIGN is the eIDAS Regulation (Electronic Identification, Authentication and Trust Services), which came into force in 2016 and was updated with eIDAS 2.0 in 2024. eIDAS creates three tiers of electronic signature:
- Simple Electronic Signature (SES): The broadest category — any data in electronic form attached to or logically associated with other data for the purpose of signing. Most everyday e-signatures fall here.
- Advanced Electronic Signature (AdES): Uniquely linked to the signatory, capable of identifying the signatory, created using data under the signatory's sole control, and detectable if the signed data is changed.
- Qualified Electronic Signature (QES): The highest level — created using a qualified signature creation device and based on a qualified certificate. These carry the same legal effect as handwritten signatures across all EU member states and are required for certain high-stakes transactions like property transfers in some jurisdictions.
The UK equivalent — Electronic Communications Act 2000
The United Kingdom has had electronic signature legislation since before ESIGN — the Electronic Communications Act 2000 was enacted contemporaneously. Post-Brexit, the UK retains its own framework separate from eIDAS. The Law Commission of England and Wales has confirmed that simple electronic signatures are valid for most contracts under English law. Deeds (used for property transfers, lasting powers of attorney, and certain other instruments) have additional requirements including a witness, which typically still requires physical presence and a wet-ink element.
What this means for your PrimeDocu signatures
When you sign a contract, NDA, service agreement, or lease using PrimeDocu in the United States, that signature is fully legally binding under the ESIGN Act. The same applies to UK users under the Electronic Communications Act 2000 for most contracts. EU users' signatures are valid as Simple Electronic Signatures under eIDAS for the vast majority of everyday transactions.
PrimeDocu maintains an audit trail with each signed document — the time and date of signing, the device and method used, and the association between the signature and the specific document version signed. This audit trail is important evidence if a signature is ever disputed.
When you might need a higher assurance level
For most everyday documents — employment contracts, NDAs, vendor agreements, consultancy arrangements, leases — a standard electronic signature is legally sufficient. Higher assurance may be required or preferred for:
- High-value property transactions (particularly in some EU jurisdictions that require QES)
- Regulated financial products in certain markets
- Government contracts with specific signature requirements
- Cross-border transactions where both parties are in jurisdictions with different requirements
In these cases, a qualified trust service provider (QTSP) offering QES, or a notarised signature, may be necessary. For the vast majority of business and personal signing needs, PrimeDocu's standard electronic signature is both legally sufficient and far more convenient than printing, signing, and scanning.
Frequently asked questions
Does the ESIGN Act apply to all contracts?
The ESIGN Act applies to most commercial and consumer contracts in the United States, including employment agreements, NDAs, service contracts, purchase orders, and loan documents. It explicitly excludes wills, certain family law documents, court orders, notices of foreclosure or repossession, and cancellation of health or life insurance. These excluded categories generally require wet-ink signatures.
What contracts can't be signed electronically?
Under the ESIGN Act, the key exclusions are wills and testamentary documents, adoption papers, divorce and family law court orders, notices of foreclosure, eviction notices, and cancellation of health or life insurance. State laws may add further exclusions. For high-stakes legal documents, always verify requirements with a qualified attorney in your jurisdiction.
Is an electronic signature on a lease legally valid under ESIGN?
Yes. Residential and commercial lease agreements are covered by the ESIGN Act, provided both parties have consented to transact electronically. An electronic signature on a lease — including one created with PrimeDocu — carries the same legal weight as a handwritten signature. Landlords may still prefer wet-ink signatures, but they cannot legally require them for a standard residential lease.