Is an eSignature Legally Binding?

Yes, in most jurisdictions. Electronic signatures collected through a compliant eSignature API carry the same legal weight as handwritten signatures for the vast majority of commercial agreements.

United States

The ESIGN Act (2000) and UETA establish that electronic signatures are legally valid for contracts, employment agreements, financial documents, NDAs, lease agreements, and most commercial transactions. For a signature to be legally binding under US law, it must meet four requirements: intent to sign, consent to do business electronically, association of the signature with the document, and record retention.

European Union

eIDAS provides the legal framework for electronic signatures across all EU member states. A Simple Electronic Signature (SES) — the level supported by eSignature API — is legally valid for most commercial agreements. Courts in EU member states recognise SES as legally binding for standard commercial contracts.

Other major jurisdictions

Electronic signatures are legally recognised in the UK (Electronic Communications Act 2000 and Electronic Identification and Trust Services Regulation 2016), Australia (Electronic Transactions Act 1999), Singapore (Electronic Transactions Act), and Canada (PIPEDA and provincial legislation), among others.

Where exceptions apply

Some document types may not be valid with electronic signatures or may require stronger authentication, depending on jurisdiction:

• Wills, codicils, and testamentary documents
• Certain family law matters (adoption, divorce filings)
• Some real estate transactions requiring notarisation
• Court orders and official government-issued documents
• Negotiable instruments (cheques, promissory notes in some jurisdictions)

For high-risk or regulated transactions, always verify the specific requirements for your jurisdiction and document type with legal counsel.

What makes an eSignature legally defensible

Beyond compliance with ESIGN/UETA/eIDAS, a legally defensible e-signature needs: a clear record of who signed (signer identity), when they signed (timestamp), what they signed (document integrity), and evidence they intended to sign (audit trail). eSignature API captures all of these as part of the standard signing workflow.