E-signature law
Electronic Signature Laws in California
Yes. California UETA gives electronic signatures the same legal effect as handwritten signatures for most commercial transactions.
Last verified July 1, 2026
Governing law
California Uniform Electronic Transactions Act (UETA), Cal. Civ. Code §§1633.1–1633.17
Enacted: 1999
Key sections
- §1633.7 (legal effect)
- §1633.5 (exceptions)
- §1633.9 (attribution)
California adopted the model UETA with minor modifications. The California UETA is substantively identical to the federal ESIGN Act for most commercial transactions. Neither statute covers all document types. The exceptions list above is not exhaustive.
California's statute works alongside the federal ESIGN Act. See ESIGN Act vs UETA: which law applies for how the two interact.
What the law requires
- The parties must agree to conduct the transaction by electronic means
- The signature must be an electronic sound, symbol, or process attached to the record
- The signature must be executed or adopted with intent to sign
- The record must be capable of being retained and accurately reproduced
- Attribution of the signature must be demonstrable
Documents that may still require a wet signature
This list is not exhaustive. When in doubt, consult a licensed attorney in the jurisdiction.
- Wills, codicils, and testamentary trusts
- Court orders and official court documents
- Notices of default, cancellation, termination, or repossession in consumer transactions (Cal. Civ. Code §1633.3)
- Documents governed by the California UCC Articles 3, 4, 4A, 5, 8, and 9 (with some exceptions)
How WoltSign addresses these requirements
WoltSign captures the elements that most e-signature laws require for enforceability: the signer's intent to sign (shown by their action of typing or drawing a signature), their consent to conduct the transaction electronically (captured at the start of each signing session), attribution (the email address and IP address associated with each signature event), and an unaltered record of the signed document with a tamper-evident audit trail.
WoltSign is designed to support the general requirements of ESIGN and UETA. Whether a specific signing session produces an enforceable signature depends on the facts of that transaction, the document type, and the applicable law. No e-signature tool can guarantee a legal outcome.
Read more in what makes an e-signature legally binding and on the e-signatures product page.
FAQ
Frequently asked questions
Short answers to the questions teams ask most often about this topic.
Are electronic signatures legal in California?
Yes. California adopted the Uniform Electronic Transactions Act (UETA) in 1999. Electronic signatures have the same legal effect as handwritten signatures in California for most commercial and consumer transactions. Exceptions apply to certain document types including wills and some court documents.
Can I use an e-signature for a real estate transaction in California?
Most real estate contracts in California can be signed electronically. Purchase agreements, listing agreements, and standard transaction documents are generally covered by California UETA. Certain deed transfers and mortgage documents may have additional requirements. Confirm with a California real estate attorney for your specific transaction.
What do I need to prove that an electronic signature is valid in California?
To establish validity under California UETA, you need to show: the parties agreed to conduct the transaction electronically, the signer acted with intent to sign, and the signature can be attributed to the signer. A complete audit trail with timestamps, IP address, email address, and document hash supports all three elements.
Does WoltSign produce the documentation needed for California e-signature validity?
WoltSign captures consent to conduct the transaction electronically, records each signing event with a timestamp and IP address, and produces a tamper-evident audit trail. Whether this satisfies the requirements of a specific California transaction is a legal question. Consult an attorney for high-stakes or regulated documents.
Start sending documents for signature
WoltSign captures consent, intent, attribution, and a tamper-evident audit trail for every signing session.