Verify Supplier Licenses, ISO & Certificates Without Handing Over Originals
Verify that a supplier "validly holds" a license, ISO, or quality/insurance certificate as a proof, without ever receiving the original. This eliminates forgery, expiry, and reuse, while still letting you track revocation.
For supplier-vetting procurement teams
Verify supplier licenses, ISO certifications, and insurance without exchanging certificate PDFs — eliminating forgery, expiry, and reuse risk.
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Procurement / purchasing / supplier-management leads in manufacturing and critical infrastructure
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Teams verifying ISO / licenses / insurance across many suppliers
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Organizations needing to prove supplier-attribute conformance for CBAM, EUDR, etc.
Hand over the source, or just the facts?
Nothing changes on the floor. Everything changes for the receiver.
① Your team just saves, as always.
- The usual step
- Fill in the record and save
- On save
- A proof is attached (API, behind the scenes)
- The document itself
- never sent
② They just open a link.
- Proven fact
- holds a valid ISO certification
- original certificates and the certifier's contact
- not shown
- Login / keys
- not needed
- The document stays private — the record itself is never sent or disclosed.
- Independent verification — the receiver just opens a link. No account, no keys.
- Edits are detected — even a one-character edit fails verification.
We verify only that a supplier "validly holds" a certification, license, or insurance — as a proof. The original (the certificate's contents) is not handed over. Because revocation (expiry, withdrawal) is trackable, "valid when submitted but now lapsed" is detectable.
Attributes are chained with issuer signatures from each supplier tier; the assembler verifies them as ZK proofs.
Why the usual methods fall short.
Only work that needs all three at once — pass without exposing, independent verification, tamper-evidence — is Lemma's domain.
| Method | Pass without exposing | Independent verification | Tamper-evident | What happens |
|---|---|---|---|---|
| Access control / permissions | △ | ✗ | ✗ | “Someone inside could have edited it” remains possible |
| Masking / redacted copies | △ | ✗ | ✗ | Redaction work grows; the original is still unproven |
| Encrypt and store / send | ✓ | ✗ | ✗ | To verify, the receiver needs it disclosed after all |
| Lemma (ZK proof)the only one with all 3 | ✓ | ✓ | ✓ | The receiver just opens a link |
How it works — and how to start.
We help design disclosure scope and retention, run the PoC, and support production.
Start with a 30-minute call.
Tell us the one procurement path where certificate-verification risk concentrates most, in the first 30 minutes. No disclosure of sensitive data required.
Find the case that matches your industry and problem
Browse all 36 use cases →TRY LEMMA
Run it yourself.
No sales call needed — start hands-on with Lemma's products.