Built-in KYC & identity verification for every e-signature
Know exactly who's on the other side before a document becomes binding. Chaindoc runs ID, liveness and AML checks inside the signing flow, powered by Sumsub, and seals the verified identity to a blockchain audit trail.
A signature is only as strong as the identity behind it
Know who signed
When a document becomes legally binding, the weakest link is attribution. Verified identity ties each signature to a real, checked person, not just an email inbox.
Make consent stick
Courts look for proof that the right person agreed. Identity verification is what turns "someone clicked" into "this person signed."
Raise the legal bar
Verifying the signatory is exactly what eIDAS Article 26 asks for. That is what turns a basic e-signature into an Advanced Electronic Signature.
Stay compliant
Regulated deals in finance, real estate and insurance carry KYC and AML duties. Chaindoc lets you meet them without bolting on a second tool.
What identity verification changes
The same signed PDF, two very different levels of certainty.
| Feature | Chaindoc | Without verification |
|---|---|---|
| Who actually signed | Verified ID + biometric | Whoever had the link |
| "I never signed this" defense | Non-repudiation evidence | Hard to rebut |
| Legal weight | eIDAS Advanced e-signature | Basic e-signature |
| AML / KYC obligations | Met in-flow | Unmet on regulated deals |
| Fraud & deepfake defense | Liveness + deepfake detection | None |
| Audit proof | Identity sealed on-chain | Email log only |
Verification, built into the signing flow
The signer verifies on any device in under a minute, without installing an app or creating an account. Powered by Sumsub.
Open the document
The signer opens your document on any device. They don't need a Chaindoc account.
Verify identity
Signing pauses for a quick check: scan a government ID and take a liveness selfie. Sumsub confirms the document is genuine and the face matches.
Screen for risk
The check screens AML, PEP and sanctions lists automatically, and flags risky parties before they sign.
Sign, sealed
The signature unlocks, and the verification result is stapled to the signed PDF and anchored to the blockchain audit trail.
Enterprise-grade verification, from your first document
Chaindoc runs identity checks through Sumsub: 14,000+ ID types · 220+ countries · liveness & deepfake detection · AML/PEP/sanctions screening. It works from your first document, with no integration to build.
Global ID coverage
14,000+ document types across 220+ countries and territories, so signers verify with the ID they already carry.
Liveness & deepfake detection
Biometric face-match with liveness checks catches masks, photos and AI deepfakes, not just a selfie.
AML & sanctions screening
Every signer is screened against PEP, sanctions and adverse-media lists as part of the check.
Reusable & business checks
Reusable KYC speeds up repeat signers, and KYB verifies companies, not just people.
Know your signer, before the ink dries
Turn on identity verification for any document and let Sumsub confirm who's really signing, sealed on-chain and ready for court.
What verified signing gives you
Beyond a checkbox: identity verification changes how much your signed documents are worth.
Fraud stopped early
Impersonation and stolen-credential signing are caught before the contract binds, not after the dispute.
Disputes you can win
A verified identity plus an on-chain trail makes "that wasn't me" very hard to argue.
Advanced e-signatures by default
Every identity-checked signature satisfies eIDAS Article 26, which makes it an Advanced Electronic Signature rather than a basic one.
Compliance without a second tool
Meet AML and KYC duties inside the same flow your team already uses to sign.
Where verified signing is essential
High-stakes agreements where knowing the signer isn't optional: real estate, insurance, healthcare and IT & agencies.
Property & finance
Regulated services
Business & tech
eIDAS. ESIGN. ISO 27001. GDPR
Identity verification runs on independently certified infrastructure, and every signature gets a blockchain audit trail anyone can verify.
Verify identities on your first document
Pay per signature instead of per seat, and turn on KYC-grade verification whenever a deal calls for it.
Common questions about KYC & identity verification
How verification works, when it's required, and what it means for your signatures. More on our support page.