Every batch that leaves our facility travels with a Certificate of Analysis, not a generic compliance stamp. The document exists so the person receiving the carton — a purchase officer, a store in-charge, a quality desk — can verify what they were promised against what arrived.
The lines worth checking first are the batch number, the manufacturing and expiry dates, and the specific test results relevant to the product class: sterility and bioburden for single-use devices, dimensional tolerances for mechanical parts, and packaging integrity for anything that travelled by road.
If a CoA does not match the carton in front of you, or the batch number is missing, do not accept the consignment on the strength of a phone call. Ask for the paperwork first — we would rather resend a document than have a batch dispute after the fact.