How to Evaluate a Manufacturer’s Quality Documentation
A manufacturer’s documentation tells you more about their quality system than a factory visit does. Request specific documents, read them properly, and know which omissions matter.
Why Documentation Reveals More
This guide is for brand owners assessing potential manufacturing partners in India.
A factory visit shows you the premises on a scheduled day. Documentation shows you what the quality system actually produces, every batch, when nobody is visiting.
A manufacturer with a functioning system produces documents that are specific, internally consistent and complete, because they are generated from real controls. A manufacturer without one produces documents that are vague, inconsistent or absent, because they are generated to satisfy a request.
Both kinds of manufacturer will tell you their quality is excellent. The documents are how you tell the difference, and reading them properly takes an hour.
What to Request
Be specific, and ask for real examples.
| Document | What You Are Looking For |
|---|---|
| Manufacturing licence | Validity, scope, and whether it covers your exact category and form |
| GMP or other certification | Current validity and issuing body |
| A real certificate of analysis | From a recent batch of a similar product |
| A product specification | With parameters, limits and methods |
| A raw material specification | Showing what they require of their own suppliers |
| A batch manufacturing record extract | To see what is actually recorded |
| Stability data for an existing product | Protocol and results |
| Testing arrangements | In-house, external, or both, with accreditation |
| Complaint and recall procedure | Existence and specificity |
| Retention sample policy | Duration and storage |
Asking for a real certificate of analysis from a recent batch of a similar product is the single most informative request. Many manufacturers will offer a blank template instead, which tells you something in itself.
Reading a Certificate of Analysis
What a good one contains.
Methods Named
Each test should name the method used. A result without a method is not verifiable and not comparable between suppliers.
Limits Stated
The specification limit alongside each result, so you can see whether a result is comfortably within or just inside.
Actual Figures
Numbers, not “complies” or “within limits”. A pass statement conceals whether the result was borderline.
Batch and Date Traceability
Batch number, manufacturing date, test date and expiry, all consistent with each other.
A certificate showing only “complies” against every parameter is the most common weak document. It may be accurate, but it gives you no information about margins, and a result sitting at the edge of specification on every batch is a different situation from one sitting comfortably inside.
Internal Consistency Checks
Quick checks that catch real problems.
- Does the licence scope actually include your product category and dosage form, or only something adjacent?
- Is the licence currently valid, by date?
- Does the certificate of analysis batch number match the batch record extract?
- Do the test dates follow the manufacturing date sensibly?
- Does the specification list every parameter the certificate reports, and vice versa?
- Are the heavy metal and microbial limits stated, and are they the ones that apply to your category?
- Does the stability protocol’s time points match the shelf life claimed?
- Is the testing laboratory named, and accredited for the methods used?
- Does the raw material specification require testing, or only a supplier declaration?
- Are the documents signed or authorised by a named person with a role?
Warning Signs
None of these is conclusive alone. Several together are informative.
- Only blank templates offered, never a real batch document.
- Certificates reporting “complies” with no figures.
- No methods named against test results.
- Licence scope that does not clearly cover your product.
- Stability data that does not exist for any product, or exists only as accelerated data.
- Raw materials accepted on supplier declaration with no testing.
- No retention sample policy, or samples not actually held.
- No written complaint or recall procedure.
- Reluctance to name the testing laboratory.
- Documents with no named signatory.
- Inconsistent batch numbers or dates between documents.
- An assurance that documentation will be provided after the order is placed.
Checklist
Before placing a first order.
- Request the licence and verify scope covers your exact category and form.
- Verify the licence is currently valid by date.
- Request a real certificate of analysis from a recent similar batch.
- Check it names methods, states limits and gives actual figures.
- Request the product and raw material specifications.
- Check the raw material specification requires testing, not just declarations.
- Request a batch manufacturing record extract.
- Check batch numbers and dates are consistent across documents.
- Request stability data with protocol and results for an existing product.
- Confirm the testing laboratory and its accreditation for the methods used.
- Request the complaint and recall procedures.
- Confirm the retention sample policy and that samples are actually held.
- Confirm documents carry a named authorising signatory.
- Count the warning signs and weigh them together.
- Agree in writing what documentation you will receive per batch.
Want to See Our Documentation First?
Ask our team for licence scope, a real certificate of analysis and our testing arrangements before you commit to anything.
Frequently Asked Questions
Why is documentation more informative than a factory visit?
Because a visit shows the premises on a scheduled day, while documentation shows what the quality system produces every batch when nobody is visiting. A functioning system generates specific, consistent, complete documents.
What is the single most useful request?
A real certificate of analysis from a recent batch of a similar product, not a blank template. Many manufacturers offer a template instead, which is itself informative.
What makes a certificate of analysis weak?
Reporting “complies” against every parameter instead of actual figures, and omitting the method used for each test. A pass statement conceals whether results sit comfortably inside specification or at its edge, and a result without a method is not verifiable.
What consistency checks are worth doing?
Whether licence scope covers your exact category and form, whether the licence is valid by date, whether batch numbers and dates match across documents, whether the specification and certificate list the same parameters, and whether the laboratory is accredited for the methods used.
What are the main warning signs?
Only templates offered, “complies” with no figures, no methods named, licence scope not clearly covering your product, no stability data, raw materials accepted on declaration alone, no retention samples, and an assurance that documentation will follow after you order.