Published · Updated · 4 min read
How to Match a COA to a Product Batch
A step-by-step checklist for matching a certificate of analysis to the exact product, strength, dosage form and lot on a package.
Short answer
Match the product name, dosage form, strength and batch or lot number on the package to the same fields on the certificate. If any key identifier differs, the certificate should not be treated as evidence for that package.
The four-field match
Begin with the package rather than the product listing. A certificate is batch-specific, so a similar compound name is not enough.
- Product or material name
- Dosage form, such as tablet, capsule, liquid or cream
- Strength and unit
- Exact batch or lot identifier
Then check the laboratory record
Once identity matches, check the testing laboratory, methods, specifications, numerical results, approval date and approver. Health Canada's GMP guide includes these items in its definition of a certificate of analysis.
A certificate showing only a general pass statement provides less context than one that shows the applicable specification and actual result.
What to do when a field differs
Do not edit, reinterpret or assume equivalence between two batches. Ask for the certificate tied to the exact package. Keep both documents separate until the mismatch is resolved.
- Do not substitute a certificate from a nearby lot.
- Do not infer tablet results apply to a liquid or cream.
- Do not rely on an assay result without its method and acceptance range.
Why the product gallery includes the certificate
On products with a matching document, IverGuy places the certificate immediately after the package image. This shortens the path from the physical presentation to the underlying batch record while preserving a link to the complete PDF.
Related product documentation
Primary sources
This guide is general product-documentation information, not medical advice. Regulatory records can change; verify current information with the linked authority.