Three questions a certificate does not answer

Check a certificate is built to keep three facts apart: whether the report is in our index, whether the issuing lab’s own record confirms it, and whether it has been linked to a supplier batch.

None of those facts prove that a particular vial came from that batch. Labels get copied. PDFs get reused. A matching code is a document match, not a custody match.

This preview does not call a laboratory. Demo codes such as WV-44821 resolve against the sample file only, so you can see the layout of a hit, a miss, and the empty state.