To verify a peptide COA, identify the issuing laboratory and compare the complete report through its own verification route. Keep document verification separate from matching the tested sample to the material offered.
Start with the complete report
| Field | Reason |
|---|---|
| Issuer and site | Identifies responsibility for the report |
| Report identifier and revision | Identifies the document and version |
| Sample and lot identifiers | Links the tested material to the supplied description |
| Methods, units, results and notes | Preserves what was actually reported |
Keep prefixes, leading zeroes and revision markers. A cropped image or redacted sample field can prevent a match even when the visible numbers look plausible. A complete report and the underlying raw analytical records are different document sets.NIST — Reporting-results crosswalk (opens in a new tab)FDA records Q&A (opens in a new tab)
Use an independently located issuer route
Find the organisation’s official website independently before using a QR code or printed contact link. The FTC explains that QR destinations can be misleading. A supplier-hosted PDF is a copy, rather than an issuer verification service simply because a code opens it.FTC — Harmful links hidden in QR codes (opens in a new tab)
SGS’s verification guidance illustrates why a complete report matters: an existing report number alone does not confirm all content of an attached copy. Record whether a reply confirms only an identifier, selected metadata or the complete report and version. No document has been submitted to that service for this guide.SGS — Document-verification FAQ (opens in a new tab)
A visible scanned signature is different from a cryptographic signature that can be validated. Where digital signing is used, check the signer and validation details; a valid signature still concerns the signed document rather than independently identifying the contents of a vial.SGS — Document-verification FAQ (opens in a new tab)Adobe — Validate digital signatures (opens in a new tab)
Keep revision and sample history attached
Compare the current report with earlier versions and record which fields changed. A corrected unit or wording is a document revision; it does not automatically mean new testing occurred. Ask the issuer to explain the change.NIST — Reporting-results crosswalk (opens in a new tab)
Keep the requested material, received sample, tests performed and issued results connected. Where a supplier lot becomes a laboratory sample code, ask for that link. A chain of custody documents transfers and identifiers; analytical identity is a separate measurement.US EPA Region 4 — Sample and Evidence Management (opens in a new tab)WHO laboratory documentation (opens in a new tab)
Accreditation is a separate check: match the organisation, site and relevant activity to the official schedule, and preserve any outside-scope footnote. If a field remains obscured or unavailable, record what that prevents you from checking.UKAS — How accreditation is obtained and its scope published (opens in a new tab)
If work was subcontracted, ask which organisation performed each measurement and who issued the final report. A logo identifies the organisation presenting the document; it does not by itself establish the performer of every reported test.NIST — Reporting-results crosswalk (opens in a new tab)WHO laboratory documentation (opens in a new tab)
A concise clarification request
Sources and further detail
- NIST — Reporting-results crosswalk (opens in a new tab)
Official 2018 one-page crosswalk; laboratory, site and customer fields briefly summarised, not the full ISO standard.
- SGS — Document-verification FAQ (opens in a new tab)
Questions 2 and 12 checked: complete report verification differs from management-system certificate directory lookup.
- FTC — Harmful links hidden in QR codes (opens in a new tab)
Official advice checked for destination inspection and independent contact routes; no claim that a particular report is malicious.
- SGS — Document-verification FAQ (opens in a new tab)
Question 3 checked for distinction between cryptographic signatures and visible signature images. No legal-effect claim reproduced.
- Adobe — Validate digital signatures (opens in a new tab)
Official documentation checked for certificate trust, validation details and timestamp distinctions. No instruction to bypass validation.
- FDA — Records and reports Q&A, question 4 (opens in a new tab)
Distinction between a report printout and full electronic analytical records.
- US EPA Region 4 — Sample and Evidence Management (opens in a new tab)
FSBPROC-005-R6, effective 1 July 2024; sections 2.3–2.6 read. Environmental custody procedures are used as an example, including their common-carrier exception. Sample S-10 is fictional.
- WHO — Quality-control laboratory guidance (2024) (opens in a new tab)
TRS 1052 Annex 4; documentary sample-to-result links only.
- UKAS — How accreditation is obtained and its scope published (opens in a new tab)
Official description of accreditation certificate and public schedule.
Revised from the existing source dossier on 3 October 2026. Supplied-report values are document transcriptions, not independent authentication or new measurements. Source notes identify the scope of each reference; this article has not undergone independent scientific peer review.