To check a peptide Certificate of Analysis, start at the website of the laboratory named on it and look up the report there. Then compare the lab’s record with your copy and the batch number on the vial. That gives you something you can check for yourself before relying on a result.
A convincing PDF can carry a copied logo, signature and test result. Even its QR code can lead to a page built to make the document look genuine. Taking a separate route to the lab helps you find out whether the report came from the people whose name appears on it.
Start at the laboratory’s website
Open the lab’s known website in a new tab and find its verification page. Check the address carefully: an extra word or a changed letter can take you somewhere else, even when the page looks familiar. Vanguard has described imitation verification sites that repeat the claims on a forged COA.
These are the current starting points for the issuers represented in our COA library. SideChain Analytics is our primary testing laboratory, with supplementary reports from Testides, Vanguard and Janoshik. Use the issuer printed on the particular report you are checking.
| Official starting point | What to use |
|---|---|
| SideChain Analytics Peptide Test Canada reports | Follow the verification service printed on your report. For a Peptide Test Canada certificate, enter its PTC- code on PTC’s verification page. SCA also has its own lookup with Report №, Sample ID and Verify code options. |
| Vanguard Laboratory | Follow Verified By Vanguard to its report search. Search by COA number or batch; product, compound and brand can help narrow the results. |
| Testides | For reports issued before September 2026, enter the complete report number. Its V2 check uses the original PDF file; a screenshot or re-export will not match the released file. |
| Janoshik | Enter the Task number and Unique key printed on the report. |
Keep the different numbers straight
The number beside “Report” may be different from the one on your vial. Copy each code into the field it belongs to, including any letters, hyphens and leading zeroes. If you are working from a photograph, check characters such as 0 and O before searching again.
| Identifier | What it connects |
|---|---|
| Batch or lot number | The vial or package to the batch named on the COA. |
| Sample ID | The sample received by the lab to its report. A separate lab code needs a clear link to the supplier’s batch. |
| Report or task number | Your copy of the report to the lab’s record. |
| Verification key or QR code | A way to retrieve the record. Check that the destination belongs to the issuer before relying on it. |
Try it with our Retatrutide 20 mg report
The report below is the July 14 COA available on our Retatrutide 20 mg page. It names Precision Synthetics Canada under End Customer, includes our admin@precisionsyn.com email, and lists lot PSN-946-0525. Those are the fields you can use to connect the supplier, report and batch number on the vial.
This certificate carries the Peptide Test Canada heading and identifies SideChain Analytics as the testing laboratory in its footer. Open Peptide Test Canada’s verification page and enter PTC-FEPQJR5Q, the code printed beneath the QR square. The returned PDF is identical to the copy on our website, so you can compare the company name, sample RET-076, report COA-2026-SC-00239 and results directly.
Our company is named here
- End customer
- Precision Synthetics Canada
- Company email
- admin@precisionsyn.com
- Lot number
- PSN-946-0525
- Report number
- COA-2026-SC-00239
- Sample ID
- RET-076
- Verification code
- PTC-FEPQJR5Q
- Analysis date
- 14 July 2026
When the details do not line up
Read the full report after a lookup succeeds, including its dates, test names, values and units. A result marked “verified” can still lead to a document for another sample, or a different version of the one you were given. If a date or result differs, keep both copies and ask the issuer which version is current and why it changed.
If no record appears, recheck the identifier and use the contact details on the issuer’s official website. Vanguard explains that some genuine reports are not publicly listed because sharing has not been approved or an upload is pending. Send the report number and the specific discrepancy so the issuer can address the record you are asking about.
Once the issuer’s record agrees with your copy and the batch connection is clear, you can read the results with that sample in mind. Our guide to reading a COA explains the individual tests. Keep the matching report with the vial’s batch reference so you can find the same evidence again when you need it.
Sources and context
Lookup instructions checked on September 15, 2026 against the official SideChain Analytics, Testides and Janoshik interfaces linked above, and Vanguard’s verification guidance of August 25, 2026. Testides describes its V2 check as a comparison with the exact released PDF; edits, annotations and re-exports can prevent a match.
The July 14 Retatrutide 20 mg report was checked through the Peptide Test Canada verification service printed on the certificate. On September 15, 2026, code PTC-FEPQJR5Q returned an active record, and its downloadable PDF matched our published PDF byte for byte. The original identifies SideChain Analytics as the testing laboratory.
Report verification establishes the origin or integrity of the report within the issuer’s stated process. The results remain limited to the sample and tests shown; a lookup does not establish that every vial was individually tested.
Research-use notice: Precision Synthetics Canada products and documentation are provided strictly for lawful, non-clinical laboratory research purposes only. COAs and testing records are not medical documents, safety guarantees, sterility guarantees, therapeutic endorsements, dosing guidance, or approval for human or veterinary use.