Yes — tuyaform signatures are legally binding.
Yes. Signatures collected through tuyaform are legally binding electronic signatures under the major frameworks that govern e-signing today, including the US ESIGN Act and UETA and the EU eIDAS regulation. Every completed document is sealed into a tamper-evident PDF backed by a full audit trail and a Certificate of Completion, so you can prove who signed, what they signed, and when. tuyaform is built to capture the four legal pillars of a valid electronic signature on every transaction, so a signed agreement holds up the same way a paper one would.
What makes an e-signature valid
A binding electronic signature rests on four things — and tuyaform builds in all of them.
Intent
The signer must intend to sign. tuyaform requires a deliberate signing action, drawing, typing, or adopting a signature and clicking Finish, never a pre-checked box or a passive page view, so intent to sign is unambiguous and recorded.
Consent
Both parties must agree to do business electronically. Before signing, each participant is presented with an electronic records and signature disclosure and must affirmatively consent. That consent, including the option to decline and sign on paper, is timestamped in the audit trail.
Attribution
The signature must be attributable to a specific person. tuyaform links each signature to a verified email address, captures the signer's IP address and device or browser fingerprint, and timestamps every action. Optional access codes, SMS one-time passcodes, and knowledge-based checks strengthen identity assurance when you need it.
Retention
The signed record must be retainable and reproducible. tuyaform delivers every signer a complete, downloadable PDF with the embedded audit trail and Certificate of Completion, and retains the sealed record so it can be accurately reproduced and presented as evidence later.
Recognized across the US and EU
ESIGN Act
The Electronic Signatures in Global and National Commerce Act of 2000 gives electronic signatures and records the same legal effect as handwritten signatures and paper documents in interstate and foreign commerce. A signature cannot be denied legal effect solely because it is electronic. tuyaform's consent disclosure and audit trail are designed around ESIGN's consumer-consent requirements.
UETA
The Uniform Electronic Transactions Act has been adopted by 49 states plus DC, the US Virgin Islands, and Puerto Rico (New York has equivalent legislation). It establishes that electronic records and signatures are valid and enforceable when parties have agreed to transact electronically. tuyaform captures that agreement and the attribution evidence UETA contemplates.
eIDAS
Regulation (EU) No 910/2014 governs electronic identification and trust services across the EU. It defines three tiers: Simple Electronic Signature (SES), Advanced Electronic Signature (AES), and Qualified Electronic Signature (QES). An electronic signature cannot be denied legal effect for being electronic. tuyaform signatures are SES by default and can incorporate stronger identity verification to support AES-grade assurance; QES requires a Qualified Trust Service Provider (see disclaimers).
The proof we attach to your documents
| Signer | Authentication | Signed (UTC) |
|---|---|---|
Alex Rivera alex@northwind.co · IP 82.14.x.x | Email verified | Jun 16, 2026 14:02 UTC |
Jordan Lee jordan@brightpath.io · IP 104.9.x.x | SMS one-time code | Jun 16, 2026 15:21 UTC |
Sealed with a cryptographic hash at completion. Any change to the document invalidates the seal — making this record tamper-evident and court-admissible.
On every certificate
- Document name and unique envelope/document ID
- Document hash (SHA-256 digest used to seal and verify integrity)
- Each signer's full name and verified email address
- Signer IP address and device/browser information
- Authentication method used (email, access code, SMS OTP, etc.)
- Consent to electronic records and signatures, with timestamp
- Timestamped event log (sent, viewed, signed, completed)
- Signature image or typed signature adopted by each signer
- Time zone and UTC timestamps for every recorded action
- Completion/sealed status and final tamper-evident seal
The audit trail
- Sent for signatureJun 16, 14:00 UTC · to 2 signers
- Viewed by Alex RiveraJun 16, 14:01 UTC · IP 82.14.x.x
- Signed by Alex RiveraJun 16, 14:02 UTC · Email verified
- Signed by Jordan LeeJun 16, 15:21 UTC · SMS code
- Completed & sealedJun 16, 15:21 UTC · Hash TF-9C2A…
Honest limits you should know
We'd rather tell you where e-signatures don't apply than over-promise.
- Some document types are commonly excluded from e-signature laws and should be executed on paper or per local rules. Under ESIGN and UETA these typically include wills, codicils, and testamentary trusts; documents governed by the Uniform Commercial Code (other than certain sections); court orders, pleadings, and other court documents; and certain notices such as cancellation of utilities, health or life insurance, foreclosure or eviction, and product recalls affecting health or safety.
- Many family-law matters (such as divorce, adoption, and child-custody documents) and certain official notices may require handwritten signatures, notarization, or witnessing under state or national law. Check the requirements for your jurisdiction and document type before relying on an e-signature.
- tuyaform produces Simple Electronic Signatures (SES) by default and supports stronger identity checks that can help meet Advanced Electronic Signature (AES) expectations. Qualified Electronic Signatures (QES) under eIDAS require identity verification and a qualified certificate issued by a Qualified Trust Service Provider (QTSP) on the EU Trusted List; tuyaform does not by itself issue QES.
- This page is general information about electronic signature law, not legal advice. Laws vary by country, state, and document type and change over time. Consult a qualified attorney in your jurisdiction before relying on an electronic signature for a specific transaction.
Binding signatures, free forever.
Send your first document and see the certificate and audit trail for yourself.