Your Supplier Changed a Raw Material: Do You Amend the CNF

A maker wrote in recently with a scenario that's more common than people admit. Her preservative supplier sent an email, buried in a routine order confirmation, saying they'd "improved the formulation" of a blend she'd been using for two years. Same product name, same catalog number, same jar label. Different INCI declaration underneath. She hadn't touched her own formula at all. Did she need to amend her CNF?

Yes, almost certainly. And the reason is worth understanding, because it's not really about the paperwork, it's about what the CNF is actually supposed to represent.

The notification describes the product you're selling, not the one you filed

Your Cosmetic Notification Form is a snapshot of what's in the bottle. When Health Canada or anyone else pulls your CN number, they're looking at a record of ingredients and concentrations that's supposed to match what a consumer can buy right now. If your supplier quietly swaps out a component, and you keep selling under the old notification, the record no longer matches reality. That's the gap an amendment closes.

This is true whether you changed the recipe yourself or your supplier changed it for you. The regulation doesn't distinguish between "I decided to swap ingredients" and "my supplier decided for me." What matters is whether the finished product's ingredient list changed.

When a supplier change actually triggers an amendment

Not every supplier tweak matters. The test is simple: did the INCI declaration or the concentration of the finished product change?

Triggers an amendment:

• The blend's component ratio shifted (say, a preservative system that moved from mostly Phenoxyethanol to mostly a different co-preservative)
• A new component was added to the blend, even a minor one like a chelator or a stabilizer
• The concentration range you'd normally file shifted meaningfully because the new blend behaves differently at a different use level

Usually does not trigger an amendment:

• The supplier changed manufacturing location or lot numbering but the INCI declaration is identical
• The product got a new package or trade name with no formula change
• A minor process change on the supplier's end that doesn't touch composition

The honest answer, though, is that you often can't tell which bucket you're in without asking. "Improved formulation" is marketing language. It could mean anything from a trivial process tweak to a real compositional shift.

What to actually ask your supplier

When you get one of these notices, don't guess. Ask for:

1. The current SDS, specifically section 3, composition and information on ingredients
2. A written confirmation of whether the INCI declaration changed from the previous version you were using
3. The effective date of the change, so you know how long you may have been selling under an inaccurate notification

If the supplier can't produce an updated SDS at all, that's a bigger problem than the amendment question. You can't file, or defend, a notification you can't substantiate.

Filing the amendment

Once you've confirmed a real compositional change, you amend the existing CNF entry rather than starting a brand new notification. You're updating the ingredient list and concentrations under the same product record, not discontinuing and refiling from scratch, unless the change is substantial enough that you're effectively treating it as a new product. Keep a dated internal note tying the amendment to the supplier's communication, in case you're ever asked to show why the change happened and when you caught it.

The habit that prevents this from becoming a scramble

Build a light version of a supplier change log. Every time a raw material supplier sends a reformulation notice, discontinuation notice, or "new and improved" announcement, log the date, the ingredient affected, and whether you confirmed a composition change. Most of the time nothing needs to happen. But the one time it does, you want a paper trail showing you caught it promptly rather than months later.

It's worth saying plainly that supplier communications like this are easy to miss. They arrive as a line item in an invoice email or a footnote on a new tech sheet, not a dedicated alert. Building the habit of scanning every supplier update for the words "reformulated," "improved," or "updated composition" is a cheap insurance policy against filing drift.

This is also where duplicating a past filing pays off. When Cosmetic Comply lets you duplicate a previous CNF entry for a minor variant, updating just the changed component and its new percentage is a much smaller task than rebuilding a filing from nothing, and it keeps the rest of your original, already-screened ingredient list intact.