Key takeaways
- A certificate of analysis describes one sample from one lot on one date. A certificate that does not identify all three is not verifiable, whatever number is printed on it.
- The two methods that carry most of the weight are chromatographic purity and mass-spectrometric identity. Purity without identity tells you the vial is clean, not what is in it.
- The strongest verification is the simplest: contact the named laboratory, or use its own verification route where one exists, and confirm the certificate came from them.
- Fabricated certificates usually fail on structure rather than on chemistry — missing lot, missing method, missing date, a laboratory that cannot be contacted, or one document reused across lots.
- Whatever you can verify, publish in a way your customers can verify too. Lot-matched, openly reachable documentation is the thing this category actually rewards.
What a certificate is, and what it is not
A certificate of analysis is a laboratory’s report on a specific sample it received, tested on a specific date, using specific methods. That is its entire scope. It is not a statement about every vial of that compound, a statement about future lots, or a quality endorsement of the seller.
This matters because the most common misuse is not forgery, it is over-extension: one genuine certificate presented as though it covers a catalog. A real document attached to the wrong lot is misleading in exactly the way a fake one is, and it is far more common.
So verification has two halves. Is the document genuine, and does it actually belong to the material in front of you? A certificate can pass the first and fail the second, and the second is the one that reaches your customer.
The fields, and which ones are checkable
Work down the document. Anything that cannot be checked against something else is presentation rather than evidence.
| Field | Why it matters | How to check it |
|---|---|---|
| Laboratory identity | Names the party making the claim | Confirm the laboratory exists, is contactable and recognises the certificate number |
| Sample or certificate identifier | Makes the document individually traceable | Quote it to the laboratory; a genuine one can be looked up |
| Lot or batch number | Ties the result to physical material | Match it against the vial label and the shipment paperwork — this is the check most often skipped |
| Date of analysis | Places the result in time | Should precede your receipt of the lot and be plausible against the shipment date |
| Product identity | States what was tested | Must match the product name and form you are selling, not a near neighbour |
| Methods used | Distinguishes evidence from assertion | Look for chromatographic purity and mass-spectrometric identity, named explicitly |
| Purity result | The headline figure | Meaningful only alongside the method and the identity result |
| Identity confirmation | Confirms the compound is what it is called | Absent surprisingly often; purity alone does not establish identity |
| Quantity or content | How much peptide is actually present | Commonly reported alongside purity; check it against the stated vial size |
| Signature or authorisation | Attributes the report to a person or role | Weak evidence alone, meaningful alongside a contactable laboratory |
How a fabricated certificate usually gives itself away
Fabrications are rarely chemically sophisticated. They fail on the parts that are tedious to fake consistently: traceability, internal agreement and contactability.
The recurring signals are a missing or generic lot number; no date, or a date that does not fit the shipment; no named method; a laboratory with no verifiable existence or no response; a chromatogram that does not correspond to the stated result; the same document appearing under several lots; and details that disagree with each other — a vial size that does not match the reported content, or a product name that does not match the identity tested.
The decisive check remains external. A document that claims a laboratory should be confirmable with that laboratory. Some laboratories publish their own verification route so a result can be confirmed independently of whoever sent you the file; where that exists, use it, and where it does not, an email quoting the certificate number usually settles the question quickly.
- No lot number, or a lot number that does not appear on the vial.
- No date of analysis, or one that cannot be reconciled with the shipment.
- A purity figure with no named method and no identity confirmation.
- A laboratory that cannot be contacted or does not recognise the certificate.
- The same certificate appearing across multiple lots or products.
- Internal contradictions between product name, form, vial size and reported content.
Publishing so your customers can verify you
Everything above is what a careful buyer will try to do to your store. The stores that do well in this category make that easy rather than hard, because verifiable documentation is one of the few genuine differentiators available.
In practice that means the certificate is attached to the lot a customer is actually buying, reachable without an account, legible on a phone, and showing the laboratory, method, lot and date rather than a cropped purity figure. Keep superseded documents distinguishable from current ones, and make a missing document an honest, visible state rather than a broken link.
Never edit a laboratory’s document. Retain the original file as issued. If you summarise it on the page, the summary must agree with the document in every field, and the document must be one click away.
Torva OS attaches certificates per product and lot, shows them on the product page and on a customer-facing documentation page, and keeps unreviewed documents distinguishable from approved ones. You can preview a storefront free with no card, or read a COA page that builds trust and organizing product COAs for the presentation side.
- Match the lot number on the certificate to the vial and the shipment paperwork.
- Confirm the certificate identifies a laboratory, a date, a method and the product you are selling.
- Confirm identity as well as purity; a purity figure alone does not say what the compound is.
- Contact the laboratory, or use its own verification route, to confirm the certificate is theirs.
- Independently test a sample from the lot at least once per new supplier.
- Publish the original document against the specific lot, reachable without an account.
Frequently asked questions
How do I check if a peptide COA is real?
Verify it with the laboratory named on it, using the certificate or sample identifier — some laboratories publish their own verification route for exactly this. Then check that the lot number on the certificate matches the vial and the shipment. A document that passes the first check but fails the second belongs to different material.
What should a certificate of analysis contain?
At minimum: the laboratory’s identity, a certificate or sample identifier, the lot or batch number, the date of analysis, the product identity, the methods used, and the results — including identity confirmation, not only a purity percentage.
Is a purity percentage enough?
No. Purity describes how much of the sample is the main component; it does not establish which compound that component is. Identity confirmation, typically by mass spectrometry, is what answers that. A certificate reporting purity without identity has only answered half the question.
Can I rely on my supplier’s certificate?
You can publish it, but once you do, the claim is yours. Verify it with the named laboratory, match it to the lot you received, and independently test a sample at least once per new supplier. See how to vet a peptide supplier.
What do I do about a lot with no certificate?
Show that honestly rather than substituting a document from another lot. A visible “documentation pending” state is more credible than a generic certificate, and reusing one across lots is the practice that makes buyers distrust the whole category.
Preview your store on Torva OS — no card needed — or explore the Desk demo, the eight themes and the plans. Questions: hello@torvaos.com.
General information for merchants, not legal, tax or financial advice. Check the rules in your jurisdiction and with your providers.