Verify a certificate.
Enter the certificate number printed on the document, or paste the share link we sent — we will tell you whether it is valid, expired, or revoked.
How verification works
- Every certificate we issue gets a unique number (e.g. NS-2026-0001) and an unguessable share link.
- Look up either one here — we check it against our records live, on every request.
- A lookup only ever tells you a status — valid, expired, revoked, or not found — never anything more.
- Lookups are rate-limited, so this page cannot be used to enumerate our clients.