A COA verification workflow is the sequence a receiving officer follows between the courier handing over a box and a vial being released into a working freezer. It is a process question rather than an analytical one: what gets checked, in what order, by whom, and what happens when a check fails. The field-by-field explanation of the document itself belongs to how to read a peptide COA. This page is about the workflow wrapped around that reading.
Split receiving from release
The single most common weakness in a laboratory's incoming process is collapsing two different events into one signature. Receiving is a custody event: the box arrived, the count matches, the cold pack was still cold, the seals were intact. Release is a documentation event: the lot identifier was matched, the record was read against your acceptance criteria, and an inventory row now exists.
Keep a quarantine state between them. A vial received but not released should be physically separated and labelled as such. Laboratories that skip the intermediate state discover the problem later, when someone has already drawn from a unit whose paperwork was never reconciled and there is no clean way to say when that happened.
Match the lot before you look at any number
Verification begins with a string comparison, not a purity figure. Enter the lot exactly as printed on the vial into batch verification, and compare what comes back with the packing list and the invoice. Three sources, one identifier.