Credentials Ops · diploma verification
Recognize the issuer, then the tier.
Diplomas verify as a binary gate with an A1–A4 assurance tier — never a false-precision score, and “cannot verify” stays distinct from “low”.
Credentials — issuer recognition → A1–A4 gate
Accreditor lookup (CHEA / ENIC-NARIC / WHED) → signature verify → tier. “Cannot verify” is never a middle score, and a missing registry reads as “unknown”, not “recognized”.
| Credential | Issuer |
|---|