Verify a certificate

Anyone can verify the authenticity of a certificate publicly, without signing in. There is no separate verification number: you verify with the certificate number from the certificate, plus the person's name and date of birth.

1. Open the public page Verify certificate (link in the website header).
2. Enter the certificate number exactly as printed on the certificate, plus the first and last name of the certified person. A middle name is optional. Upper and lower case in the name do not matter.
3. Enter the person's date of birth. It must match exactly the date stored for the person at the issuer.
4. Operate the slider (security check). It can also be operated with the keyboard.
5. Choose Verify certificate. The result appears directly below the form.
6. Valid, Expired and Archived show certificate type, certificate number, issuer, issue date and valid until. Valid means the certificate is active and its expiry date has not passed. Expired means the Valid until date is in the past. Archived means the certificate was archived at the issuer and can still be found as issued.
7. Revoked means the issuer withdrew the certificate. Only this notice and, if available, the revocation date are shown, nothing else. Superseded means a newer certificate has taken its place. Ask the issuer for the current certificate.
8. Certificate not found appears if the number is unknown or the name or date of birth do not match. The two cases are deliberately not told apart. Check your input for typos.
9. The verification page shows no personal data, neither name nor date of birth. Only a few checks per minute and internet address are possible. After too many attempts an error message appears and you try again a little later.
10. Hash verification archive: when a certificate is archived, DASon stores a verification hash for it. It is calculated from the certificate identifier, certificate number and company and contains no personal data. If a hash archive was agreed with the issuer (DPA), this proof remains after the company is deleted and still shows certificate type, number, dates and issuer. The verification page has no input field for it, the hash lookup is only possible through the platform's interface.

For issuers: you assign the number per certificate type according to the configured numbering mode (random, sequential or self-assigned). For a recipient to be able to verify their certificate, the person's date of birth must be stored. Without a date of birth the check always fails.