How buyers verify a peptide COA, and how to make yours pass in ten seconds

What a careful buyer checks

1. The batch number. Does the number on the report match the number printed on the vial label? If the report has no batch number, it proves nothing about their vial.
2. The lab. Is a real, named lab on the report, and can the buyer find that lab independently?
3. The date. When was it tested, relative to when the batch was made and sold?
4. Identity. Was the compound confirmed to be what the label says, usually by mass spectrometry?
5. Purity. What percentage did HPLC find, and does it meet what you advertise?
6. Quantity. Does the measured amount per vial match the label, or only the purity?
7. Independent confirmation. Can the report be looked up on the lab's own site with a report number or key?

How buyers check a report is genuine

The strongest check is the lab itself. Many labs that test research peptides let anyone look up a report on their own website. Freedom Diagnostics Testing, for example, offers a public lookup by accession number or company name, and Finnrick has a verify-a-COA page. A report that the lab's own site confirms is very hard to fake.

When there is no lookup, buyers fall back on details:

• The same report appearing on several sellers' sites, or across several of one seller's batches.
• A test date earlier than the batch could have existed.
• A report for a different vial size than the one being sold.
• Fonts, alignment or numbers that look edited, or a PDF that was clearly retyped.
• A lab name that leads nowhere, or a lab that will not confirm its own report.

If any of these appears on your site, even by accident, fix it before a buyer finds it. One suspicious report makes every other report on the site look suspicious.

Make your reports pass in ten seconds

The goal is that a buyer never has to email you to verify anything. Every answer should be one click or one scan away.

• Give every batch its own public page showing the product, batch number, lab, test date, identity, purity and valid-until date.
• Print a QR code on the vial label that opens that page, so the buyer checks the vial in their hand, not a generic product report.
• Link to the lab's own lookup page for that report whenever the lab offers one.
• Show whether the batch is currently released for sale, and take it off sale the day its report expires.
• Keep the full PDF available, but lead with the key facts in plain text so they read on a phone.

The vial label guide covers the QR code, and the guide to building a lab report library covers the structure behind it.

When a buyer questions a report

1. Ask for the batch number on their vial, and send the report for that exact batch.
2. Point them to the lab's own lookup so they can confirm it without trusting you.
3. If the report and their vial disagree, take it seriously: check the batch record, and if you cannot explain the difference, pull the batch and retest it.
4. Record the question and your answer on the batch. A pattern of questions about one batch is an early warning.

Doing it in Purity

In Purity, every batch has a public report page that needs no login and shows whether the batch is released, awaiting its report, or not released. Batch labels print with a QR code that opens it. Batches stay off sale until their report passes your release rule, and each order line records the batch that filled it, so "which batch did I get?" always has an answer. See it on the demo.