Sign documents with NFC
Replace pen-on-paper signatures with NFC-based digital signatures that are uncopyable, verifiable, and tied to a verified identity. Because in 2025, a squiggle on paper shouldn't be your proof of agreement.
Paper Signatures are broken
We trust pen-on-paper signatures for some of the most important agreements in our lives. But the reality is — they offer almost zero security.
Trivially forgeable
If you've seen one signature, you can fake it. There's no cryptographic proof, no verification mechanism — just ink on paper.
No proof of identity
A signature doesn't prove who signed it. Anyone can scribble a name. There's no link to a verified identity.
No auditability
When was it signed? Was the signer actually present? Was the document altered after signing? Paper can't answer any of these questions.
TAGBASE Signature: NFC meets identity
Replace ink signatures with uncopyable NFC tags and a mobile app that ties every signature to a verified identity.
NFC tags instead of Signatures
Place blank NFC tags on your documents where signatures would normally go. Instead of signing with a pen, the signer taps the tag with the TAGBASE Signature app. The tag becomes a cryptographic proof of agreement — uncopyable and permanently linked to the signer.
Verified identity via KYC
The Signature app lets users register with their personal data — name, address, and optionally verify their identity through a KYC process using a passport or driver's license. Every signature is then tied to a verified individual, not just a scribble.
Anyone can Verify
Once a tag is signed, anyone can tap it with their phone to see who signed it, when they signed, and whether their identity was kYC-verified. No app required for verification — just tap and see.
Document authenticity included
Combine signature tags with TAGBASE Verify tags on the same document. Prove both that the document is authentic and that it was signed by verified individuals — all through NFC.
Sign in seconds, Verify forever
A simple three-step process that replaces pen signatures with cryptographic proof.
Set up your identity
Download the TAGBASE Signature app, enter your personal details, and optionally verify your identity through our KYC process using your passport or driver's license.
Tap to sign
When you need to sign a document, tap the blank NFC tag on the document with your phone. The app cryptographically signs the tag and links it to your verified identity.
Anyone can Verify
Anyone can tap the signed tag with their phone to instantly see who signed it, when, and whether their identity is kYC-verified. No app needed for verification.
Real-World use cases
Anywhere people sign paper today, TAGBASE Signature can make it verifiable and trustworthy.
Vehicle sales
Buyer and seller each sign an NFC tag on the sales contract. Anyone — including authorities — can verify who was involved and when the transaction took place.
Contracts & agreements
Rental agreements, employment contracts, service agreements — replace unverifiable ink signatures with cryptographic proof tied to verified identities.
Certificates & diplomas
Universities and training providers can issue certificates with NFC signature tags that prove the document is genuine and was signed by an authorized person.
Property & real estate
Property handover protocols, inspection reports, and agreements between landlords and tenants — all verifiably signed.
Legal documents
Powers of attorney, declarations, witness statements — documents where identity verification matters most benefit from kYC-backed signatures.
Compliance & auditing
Sign off on inspection reports, safety checks, and compliance documents with verifiable proof of who performed the sign-off and when.
Why NFC Signatures beat pen & paper
| Feature | Pen Signature | TAGBASE Signature |
|---|---|---|
| Forgery protection | ||
| Identity verification | ||
| Timestamp proof | ||
| Anyone can Verify | ||
| KYC-Backed | ||
| Works on physical docs | ||
| No special equipment |
Be among the first to sign differently
TAGBASE Signature is currently in development. Interested in bringing verifiable signatures to your organization? Let's talk.
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