Every ACADA certificate carries a number, printed on it. Enter it here to see whether it is valid, who holds it, which course it is for, and who signed it. No account needed.
The number starts with AC- and has ten letters and digits. A certificate printed before September 2026 may not show one; ask the holder to open it on ACADA, which now carries the number. What a certificate does and does not mean is in the Credential Policy.