How to Verify a Certificate of Analysis
A COA should be verified before it is relied upon for a quality claim.
Confirm laboratory identity
Check the laboratory name, address, contact information, and report format against official sources.
Confirm report number
Use the laboratory’s verification portal or contact process where available.
Match the batch
The product name, lot number, and sample identifier should match the physical material.
Review dates
Check sample receipt, testing, report issuance, and revision dates for consistency.
Review attachments
Chromatograms and spectra should contain matching sample identifiers and acquisition dates.
Frequently asked questions
Can QR codes be trusted automatically?
No. Confirm that the code resolves to the official laboratory domain or verification system.
Is a PDF signature enough?
Not by itself. Report traceability and laboratory confirmation matter.
Can a reseller issue a COA?
A reseller can distribute a report, but the testing laboratory should remain identifiable.
Why contact the lab?
It can confirm authenticity and whether the report was altered.
Key takeaways
COA verification connects the document to the issuing laboratory, tested sample, and batch. Authenticity should be demonstrated rather than assumed.
References
- FDA. Data Integrity and Compliance With Drug CGMP: Questions and Answers.
- OECD Principles of Good Laboratory Practice.
- ISO/IEC 17025 overview.
TSMS Labs educational disclaimer: For laboratory research and educational purposes only. Not for human consumption. This content is not medical, clinical, or regulatory advice.