CA E-Signature API
ClosingSignIQ in California
Embed legally binding e-signatures in your California application. Every signed document sealed with an X.509 digital certificate from our Certificate Authority. California has adopted UETA. ESIGN Act compliant. $0 per-envelope cost.
CA E-Signature Law
Electronic signatures are legally binding in California.
ESIGN Act
Federal Law (2000)
15 USC §7001. Electronic signatures have the same legal effect as wet-ink signatures in all 50 states.
UETA Status
California has adopted UETA
California adopted the Uniform Electronic Transactions Act, providing state-level recognition of electronic signatures.
Remote Notarization
Legal since 2024
California permits Remote Online Notarization (RON). California Civil Code Section 1183 et seq. (AB 743)
Notary Fee Cap
$15 per signature notarized
ClosingSignIQ e-signatures are $5/envelope (Pay-Go) or FREE on Pro+, regardless of state. Notarization fees follow state law.
CA Documents
Common California documents for e-signature.
Real estate deeds of trust
Powers of attorney
Immigration affidavits
Business formation documents
Estate planning documents
Key California industries using ClosingSignIQ:
Technology and softwareEntertainment and mediaAgricultureInternational trade
California
E-signatures where California does business.
Video by Logan Voss on Pexels
Integration
Add e-signatures to your California app in minutes.
your-california-app/api/sign.ts
// Send a real estate deeds of trust for e-signature in California
const envelope = await fetch('https://closingiq.app/api/v1/signing/envelopes', {
method: 'POST',
headers: { 'X-API-KEY': process.env.CLOSINGSIGNIQ_KEY, 'Content-Type': 'application/json' },
body: JSON.stringify({
title: 'Real estate deeds of trust — California',
signers: [{ name: 'Signer Name', email: '[email protected]' }],
}),
});
// X.509 certificate + SHA-256 audit trail included automaticallyAPI Pricing
Start free. Scale in any state.
Free
$0
5 envelopes/month
- ✓ API + OAuth
- ✓ Audit trail
- ✓ Email notifications
Starter
$29/mo
50 included, then $0.50
- ✓ Embedded signing
- ✓ X.509 certificate
- ✓ Webhooks
Growth
$79/mo
250 included, then $0.35
- ✓ White-label
- ✓ our CA certs
- ✓ SMS notifications
Scale
$199/mo
1,000 included, then $0.25
- ✓ Full white-label
- ✓ Templates API
- ✓ 99.9% SLA
CA Cities
ClosingSignIQ API in California cities.
FAQ
E-signature API questions for California.
Is remote online notarization legal in California?
Yes. California enacted AB 743 in 2024, authorizing RON with effective implementation in 2025. California was among the last major states to adopt RON. Notaries must complete additional education and use approved platforms. Additionally, ClosingSignIQ provides X.509 digital certificates from our Certificate Authority and SHA-256 hash-chained audit trails for every signature.
How much does a California apostille cost?
The California Secretary of State charges $20 per apostille. Documents can be submitted by mail or in person at the Sacramento or Los Angeles offices. Walk-in service allows same-day processing. Additionally, ClosingSignIQ provides X.509 digital certificates from our Certificate Authority and SHA-256 hash-chained audit trails for every signature.
What is the notary fee cap in California?
California notaries may charge up to $15 per signature notarized. This is one of the most specific fee structures in the country, based on signatures rather than documents. Additionally, ClosingSignIQ provides X.509 digital certificates from our Certificate Authority and SHA-256 hash-chained audit trails for every signature.
Can California notaries notarize documents in languages other than English?
California notaries can notarize documents in any language, but the notarial certificate must be in English. The notary does not need to read or understand the document content, only verify identity and willingness to sign. Additionally, ClosingSignIQ provides X.509 digital certificates from our Certificate Authority and SHA-256 hash-chained audit trails for every signature.
Are there special requirements for real estate notarizations in California?
Yes. California requires notaries to maintain a sequential journal of all notarial acts, thumbprint signers for deeds and powers of attorney affecting real property, and use specific acknowledgment forms prescribed by state law. Additionally, ClosingSignIQ provides X.509 digital certificates from our Certificate Authority and SHA-256 hash-chained audit trails for every signature.
Can I use an interpreter during notarization in California?
No. The California Notary Handbook expressly states that interpreters should not be used during the notarial ceremony, as vital information could be lost in translation. Direct communication between the notary and signer is strictly required. If you cannot communicate in English, your notarization can be routed through a notary in a state that permits interpreters. ClosingIQ offers 189-language document translation. Additionally, ClosingSignIQ provides X.509 digital certificates from our Certificate Authority and SHA-256 hash-chained audit trails for every signature.
What makes ClosingSignIQ different from DocuSign or BoldSign?
ClosingSignIQ is the only e-signature API with built-in AI document scanning and X.509 digital certificates from our Certificate Authority. Every signature includes a SHA-256 hash-chained audit trail. Plus, our API costs 80% less than DocuSign with $0 per-envelope infrastructure costs.
Ship e-signatures in California today.
Free tier. X.509 certificates. SHA-256 audit trail. ESIGN Act + California UETA compliant.