E-Signature Law
Are Electronic Signatures Legal in California?
Updated September 22, 2026. General information, not legal advice.
Yes, electronic signatures are legal in California. California adopted UETA — the Uniform Electronic Transactions Act — in 1999 (Stats. 1999, Ch. 428), effective January 1, 2000, codified at California Civil Code §1633.1 et seq. What makes California worth its own page: its exclusion list goes beyond the standard UETA model, with several consumer-protection and real-estate-specific carve-outs most other UETA states don't have.
The governing law
California Civil Code, Division 3, Part 2, Title 2.5 — the Uniform Electronic Transactions Act, §1633.1 et seq. Enacted in 1999, effective January 1, 2000.
What California excludes — broader than the base UETA model
California's Civil Code §1633.3 carries the standard UETA exclusions (wills, codicils, and testamentary trusts; most Uniform Commercial Code provisions outside Division 1's §§1206 and 1306, and Divisions 3, 4, 5, 8, 9, and 11), plus additional California-specific exclusions that go further than most other states:
- Home solicitation contracts (door-to-door and similar sales) — a specific California consumer-protection category.
- Mobile home residency law matters.
- Blanket-encumbrance property transfers and condominium transfers — real-estate-specific carve-outs.
- Emergency repair and service contracts.
- Home equity sale contracts, and consumer-protection provisions around mortgage default and foreclosure.
The pattern is consistent: California's additions to the base UETA exclusion list cluster around real estate and consumer protection — areas where the state legislature apparently decided a wet signature (or at least additional formality) still matters more than the default UETA model assumes.
What this means in practice
For the overwhelming majority of California business — service agreements, proposals, NDAs, most contracts between businesses or with consumers outside the categories above — UETA treats a properly executed electronic signature as fully binding, same as anywhere else. The extra exclusions matter specifically in real estate and certain consumer-protection contexts; if a transaction touches home solicitation, mobile home residency, or the property-transfer categories above, confirm whether California's exclusion actually applies before assuming e-signature is an option.
General information, not legal advice for your specific situation. This page's California-specific exclusions were compiled from secondary legal-reference sources, not fetched directly from California's own official code site during this research pass — confirm the current text of Civil Code §1633.3 directly, or with an attorney licensed in California, before relying on this for anything consequential.