Kyle Moloney
Procurement & Operations | 10+ Years
Kyle has spent over a decade managing procurement and operations for manufacturing companies ranging from small food producers to mid-size contract manufacturers. He now writes about practical inventory management, supply chain, and production operations.
Most manufacturers don't lose CoAs. They lose track of which CoA belongs to which lot, or they have the document somewhere but not in a form that's retrievable in the five minutes an auditor is willing to wait. Organizing lot documents isn't about collecting more paperwork — it's about making the paperwork you already collect actually findable when someone asks for it, which tends to be at the worst possible time.
This is the workflow I walk manufacturers through when they're standing up a real document process for the first time, whether they're coming from an email-and-shared-drive system or no consistent system at all.
Step 1: Decide What You Collect at Receiving
Before a shipment arrives, know what documents you expect with it. Not every material needs every document type — a bulk commodity ingredient might just need a CoA and SDS, while a food ingredient going into an allergen-labeled product needs an allergen statement too, and an internationally sourced material needs a Country of Origin Certificate.
Build a simple standard by material category: which document types are required, which are optional, and which don't apply. This removes the guesswork from receiving staff and gives you a clear gap to chase when a shipment arrives without something it should have.
Step 2: Collect Documents Before the Lot Goes Into Production
The single biggest source of missing documents is asking for them too late. If receiving accepts a lot without its CoA and production consumes part of that lot before the document shows up, you're now chasing paperwork for material that's already partially used — and a supplier who's slow to send a CoA on request tends to be even slower once the transaction feels closed on their end.
Where possible, make document receipt part of the lot's arrival, not a follow-up task. A lot flagged as "received, documents pending" is a visible signal that something's outstanding; a lot marked simply "received" with a missing document buried somewhere is invisible until someone specifically goes looking.
Step 3: Type and Label Documents Consistently
A folder of PDFs named "flour_cert.pdf," "Flour CoA (2).pdf," and "scan0043.pdf" is technically a record, but it's not a retrievable one. The fix is consistent typing: every document gets assigned an actual type — CoA, SDS, CoC, TDS, allergen statement, one of the certification types, and so on — rather than living as an undifferentiated attachment.
For anything that doesn't fit a named type — a Bill of Lading, a Commercial Invoice, a packaging spec or drawing — use a custom label instead of forcing it into the wrong category or skipping typing altogether. The goal is that a search by document type returns everything of that kind across every lot, not just the ones someone happened to name correctly.
Step 4: Attach Documents to the Lot, Not the Product
This is the step that breaks most manual systems. A CoA is a statement about a specific batch — it reports what a lab actually measured in that lot, not what the material is expected to be in general. Filing it against the product (all "Fragrance Oil X" documents in one shared folder) instead of the specific lot means you have documents, but you don't have the link an auditor is actually testing for: can you produce the CoA for this exact lot, right now.
In Nstock, every material lot record supports its own set of typed documents — uploaded files or pasted links — attached directly to that lot rather than to the product it belongs to. A CoA uploaded at receiving stays attached to that specific lot for as long as the lot record exists.
Step 5: Keep Documents Attached Through Production and End of Life
A lot's paper trail doesn't end when the material gets consumed into a batch, and it shouldn't disappear when the lot is written off as waste. If a recall investigation or a customer complaint surfaces months later, the documents for that lot — CoA, test report, allergen statement, whatever applied — need to still be retrievable, whether the lot is sitting on a shelf, fully consumed into finished goods, or logged as a waste entry.
Nstock's lot documents travel with the lot record itself through this entire lifecycle — receiving, production consumption, and into waste or recall records — so a document attached at receiving doesn't need to be re-found or re-attached later.
Step 6: Run a Practice Retrieval
The real test of an organized document system isn't whether the documents exist — it's how long it takes to produce them on request. Periodically pick a lot at random, set a timer, and try to pull every document attached to it. If that takes longer than a few minutes, that's the specific gap to close before an actual auditor or customer runs the same exercise and finds it for you.
This is also a good habit to pair with the broader compliance picture — see Lot Tracking for Compliance for how document retrieval fits into passing a full traceability audit, not just producing one file on request.
What Auditors and Customers Actually Ask For
In practice, the requests tend to fall into a few repeated patterns: an auditor asking for the CoA and any certifications tied to a specific finished-goods lot's ingredients; a retail buyer asking for an allergen statement or Non-GMO Certificate before finalizing a listing; a customs broker asking for a Country of Origin Certificate on an international shipment; and, in a recall scenario, everything at once for a narrow set of affected lots, under real time pressure. None of these are unusual or unreasonable requests — they're the normal cost of doing business in a regulated or retail-facing category. The only variable that changes is how long it takes you to answer.
For a fuller rundown of what each document type actually is and who typically asks for it, see The Documents That Travel With a Material Lot. For cosmetics manufacturers specifically, document requests tend to cluster around allergen and safety documentation given how frequently formulations and suppliers change.
Frequently Asked Questions
Where should CoAs and other lot documents be stored?
Attached directly to the specific lot they apply to, not filed generically by product or material name. A CoA is a statement about one lot's test results — storing it disconnected from which lot it covers defeats the purpose the moment someone needs to retrieve it under time pressure.
How many document types does a typical lot need?
It varies by material and industry. A basic commodity ingredient might only need a CoA and SDS. A food ingredient going into an allergen-labeled, retail product could carry a CoA, SDS, allergen statement, and one or more certifications. There's no fixed number — collect what your material and customer requirements actually call for.
What if a document doesn't fit any of the standard types?
Use a custom label rather than skipping it or forcing it into the wrong category. Nstock's 'Other' document type with a custom label covers things like a Bill of Lading, a Commercial Invoice, or a packaging specification — documents that are genuinely common but don't warrant their own named type.
Can documents be links instead of uploaded files?
Yes. Nstock supports both uploaded files and pasted links for lot documents, so a document that already lives in a supplier portal or a shared drive can be attached to the lot as a link without needing to be downloaded and re-uploaded.
See how Nstock's lot tracking feature works →
— Kyle Moloney, Procurement & Operations