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.
The failure mode this prevents is specific and frequent: someone files a genuine certificate belonging to an adjacent lot from the same campaign against the vial in hand. Every number on it is real. None of it describes the material on the bench. Once that PDF is in the quality file, the error is invisible to anyone who does not repeat the comparison.
Decide in advance what a missing record means
A lot with no published record is not a failed lot. It usually means analytical release or upload is still pending. That is a fact about publication timing, and your SOP should say what you do about it before the situation arises rather than during it.
Write the rule down: hold the unit in quarantine, raise the lot identifier through documentation request, and set a review date. The batch verification guide covers how the portal behaves when a record is not yet there. What matters procedurally is that the decision is a policy, not an improvisation by whoever happened to sign for the delivery.
Read the record against your own criteria
Once the identifiers agree, the document is read. Confirm that the method titles are described rather than merely named, that the test date is present, and that the strength on the record matches the SKU ordered. Then compare each field against your laboratory's written acceptance criteria.
Your criteria are yours. A supplier record is a reference layer, and no percentage on it substitutes for your incoming qualification standard. Where the underlying analysis needs explaining to a colleague, point them at HPLC purity on a COA or mass spectrometry on a COA rather than paraphrasing from memory.
Record the check, not only the outcome
An audit file that says "COA verified" tells a reviewer nothing. Record who performed the comparison, on what date, which lot string was entered, what the portal returned, and where the PDF now lives. Store the document against the inventory row rather than in a shared mailbox. Documentation traceability covers how those records connect across an order.
Use a single physical artefact so the sequence does not depend on individual memory. The COA receiving checklist is designed to sit at the receiving bench and be initialled.
Give discrepancies a named owner
When the record and the vial disagree, the unit stays sealed and quarantined, and one named person owns the resolution. Write down the exact string on the label, the exact string on the record, and the date observed. Most discrepancies turn out to be mundane, but the reconciliation only has value if it exists in writing. A discrepancy resolved in a phone call is the version an auditor will question.
FAQ
Do we verify every vial or every lot?
Verify every lot, and confirm every vial's printed lot against the lot you verified. Those are two different checks and both are quick. Skipping the per-vial glance is how a single mixed carton becomes an untraceable inventory row.
Can an emailed PDF replace the portal record?
Not on its own. A forwarded document that does not carry the lot identifier printed on the vial is not evidence about that vial. Use the COA portal or the verification lookup as the reference source, and keep the email as correspondence rather than as the record.
Who should own the workflow?
Whoever signs for deliveries performs the custody check; a QA-designated reviewer performs the release. Separating those two roles is what makes the sign-off meaningful, and it also gives you a person to ask when a file is incomplete six months later.
Does a verified COA change how the material may be used?
No. Verification confirms that a record exists and corresponds to the lot in front of you. The material remains for in vitro laboratory research only.