What Documents to Get From Your Contract Manufacturer

Working with a contract manufacturer is great for getting a product to market without building your own lab, and it creates one specific compliance headache: you are the one whose name goes on the notification, but you often are not the one who bought the raw ingredients. If your contract manufacturer hands you a finished product and a one-page ingredient list, you do not have what you need to file accurately.

Why this responsibility does not transfer with the manufacturing

Using a contract manufacturer changes who mixes your product. It does not change who is responsible for filing the Cosmetic Notification Form for it. If you are the brand selling under your own name, the notification obligation sits with you, and Health Canada is not going to accept "my manufacturer handles that" as a substitute for you actually filing, or filing accurately.

That means the quality of the documents your manufacturer gives you directly determines whether your filing is accurate. A vague ingredient list with trade names and rounded percentages is not enough to map to real INCI names and file a defensible concentration.

The document list to actually request

• Full formula breakdown by INCI name and percentage. Not a marketing ingredient list, the actual internal formula sheet with every ingredient's real percentage, including anything under 1% that might otherwise get lumped into an "other ingredients" line.
• Safety data sheets for every raw material and blend used. An SDS has 16 sections, and section 3 lists composition, which is often where a blend's actual component breakdown lives if your manufacturer will not share their proprietary formula sheet directly.
• Certificates of analysis for batches, where relevant. These confirm what was actually in a given production run, which matters if your formula has any variability between batches.
• Documentation of any supplier blend components. If your manufacturer uses a proprietary preservative or active blend from one of their own suppliers, you need that blend's components and percentages, not just the blend's trade name and total use rate in your product.
• Confirmation of manufacturing practices. Many contract manufacturers operate under ISO 22716 good manufacturing practice guidance for cosmetics. Ask for confirmation of this, since it supports your own safety substantiation file.
• Written confirmation of who is responsible for what. Some contract manufacturers offer to handle notification filing as part of their service. If yours does, get in writing exactly what they are filing and when, since you remain accountable even if they are doing the paperwork on your behalf.

A working reference table

Document	What it gives you	Why it matters for filing
Full INCI formula breakdown	Every ingredient by name and real percentage	Required to file accurate concentrations on the CNF
Safety data sheets	Section 3 composition detail for raw materials and blends	Fills gaps when a manufacturer will not share full proprietary formulas
Certificate of analysis	Confirms what was actually in a specific batch	Useful if formula has run-to-run variability
Blend component breakdown	Real percentages of each component inside a supplier blend	Needed to calculate true finished-product concentrations
GMP confirmation (ISO 22716)	Evidence of manufacturing quality practices	Supports your safety substantiation
Filing responsibility agreement	Clarity on who files, and when	Prevents a gap where nobody actually submits the CNF

When your manufacturer won't share the full formula

Some contract manufacturers treat their exact formula as proprietary and will only give you a percentage range or a partial breakdown, protecting their own formulation IP. This is a real tension, and it's worth resolving before you sign a manufacturing agreement rather than after your first CNF is already overdue. A workable middle ground: your manufacturer files the notification directly using their own knowledge of the full formula, with you confirming as the responsible brand, or they provide you a percentage range specific enough that you can still make an accurate Hotlist and allergen check, even if they hold back some proprietary detail.

What does not work is accepting a vague ingredient list, filing rounded or guessed concentrations, and hoping nothing comes up later. If a concentration ever gets questioned, "my manufacturer wouldn't tell me the real number" is not a defense that helps you.

Getting the filing done once you have the paperwork

Once you actually have a full INCI breakdown with real percentages, whether that comes straight from your manufacturer or after some back and forth, the rest of the filing process is the same as if you had formulated it yourself: map every ingredient, expand any blends, check against the current Hotlist and allergen thresholds, and file within 10 days of first sale.

If you are managing several private-label products from the same or different contract manufacturers, Cosmetic Comply can take whatever formula documentation you do receive, map it to INCI names and CAS numbers, expand supplier blends and carry the percentages through, and screen the result against the Hotlist, with a human reviewer checking it before filing. It won't get a reluctant manufacturer to hand over their proprietary formula, but it will make sure that once you have the numbers, nothing in the filing itself slips through.