How to Upload a COA to Amazon Seller Central (Step by Step)

Quick answer

Amazon asks for your Certificate of Analysis through the document compliance request in Seller Central — usually triggered after you list a supplement or when they do a routine audit of your catalog. You upload the COA as a PDF, fill in some metadata, and wait.

Sounds simple. It's not. The upload portal is buried, the naming conventions aren't documented anywhere obvious, and tiny mistakes get your submission bounced back into a queue that can take weeks.

Here's exactly how to do it right the first time.

Where to find the upload portal in Seller Central

Amazon doesn't put a big "Upload COA Here" button on your dashboard. Here's how you actually find it:

Log into Seller Central.
Go to the Performance tab in the top nav.
Click Account Health.
Look for any flagged ASIN with a compliance issue — it'll say something like "Product Authenticity / Customer Safety — Document Request."
Click the notification. That opens the document submission portal for that specific ASIN.

Alternatively, if you just listed a new supplement ASIN:

Go to Inventory → Manage Inventory.
Find the ASIN.
Look at the column labeled "Quality Alerts" or "Issues."
Click the alert link — it opens the document request.

⚠️ Note

If you don't see a document request and your listing is already active, Amazon might still ask later. They audit supplement listings in waves. Don't wait for the request — get your COA ready now so you're not scrambling.

What format Amazon wants

This is where people mess up. Amazon's portal is picky.

Accepted formats: PDF only. Not Word. Not an image file. Not a Google Drive link. A real PDF.

File size limit: Usually 10 MB per document. If your COA has high-res scans, compress it.

Page count: No hard limit, but keep it reasonable. A 1-3 page COA is normal. A 47-page lab report with raw data appended might confuse the reviewer.

Signatures and stamps: Digital signatures are fine. Wet-ink scans are fine. What matters is that the document looks official — lab letterhead, accreditation logo, unique report number.

Language: English. If your lab is overseas and the COA is in another language, get it translated. Amazon's documentation reviewers are primarily English-language and will reject things they can't read.

How to name your COA file before uploading

Amazon doesn't publish a naming convention. But the reviewers are human, and a clean filename helps. Here's what I use:

[Brand]-[Product]-COA-[LotNumber]-[Date].pdf

Example:

AcmeBrand-TurmericGummies-COA-LOT0426-2026-05-15.pdf

What not to do:

Don't name it coa.pdf or document.pdf — too generic.
Don't use spaces or special characters in filenames.
Don't use the lab's internal filename like RPT-88472-FINAL.pdf — it means nothing to the reviewer.

Step-by-step upload walkthrough

Here's the actual flow once you're in the document request portal:

Step 1: Read the request carefully. Amazon will list exactly which documents they want. Sometimes it's just a COA. Sometimes they also ask for a GMP certificate, product images, or a letter of guarantee. Read every line.

Step 2: Prepare your files. Have the COA PDF ready. If they ask for multiple documents, prepare each as a separate PDF — don't combine everything into one file unless the portal description explicitly says to.

Step 3: Click "Upload Document." The portal will show a file picker. Select your PDF.

Step 4: Fill in the metadata fields. This is the part everyone rushes through. Amazon usually asks for:

Document type (select "Certificate of Analysis" or similar)
Issuing organization (the lab's full legal name)
Document date (the COA's issue date)
Product name (must match your listing exactly)
Lot or batch number (must match the COA)
Expiration date if applicable
Any additional notes Amazon requests

Step 5: Review and submit. Double-check every field against your COA. One mismatched lot number and it's coming back.

Step 6: Save the confirmation. Amazon shows a submission confirmation with a reference number. Screenshot it. If something goes wrong, you'll need that reference.

💡 Note

Bookmark the confirmation page or save the case ID. If your submission vanishes into the void (it happens), having the case ID lets Seller Support actually find it instead of shrugging.

How long the review takes

Amazon's stated timeframe for document review is 2-5 business days. In reality:

Simple COA reviews: 1-3 days
Complex or flagged ASINs: 5-10 days
During peak periods (Q4, Prime Day prep): can stretch to 2+ weeks
If rejected and resubmitted: the clock resets

You can check the status under Performance → Account Health → Document Requests. It'll show as "Under Review," "Approved," or "Rejected."

Common upload rejection reasons

Based on what sellers report, here's what gets COAs kicked back most often:

Wrong file format. You uploaded a .docx when they only take PDF. Or your PDF is corrupted.

Expired COA. The COA date is older than 12 months, or the lab's ISO certificate expired.

Metadata doesn't match the COA. You typed "Lot 1234" in the form but the COA says "Lot 5678." Instant reject.

Lab not third-party. The reviewer checked the lab name and found it's the manufacturer — Amazon wants an independent third-party lab. Rejected.

Lab accreditation missing or unclear. The COA doesn't show an accreditation number or the accrediting body's logo.

Product mismatch. The product name you listed doesn't match what's on the COA. Could be a minor spelling difference — doesn't matter. Rejected.

Incomplete test panel. Amazon asked for heavy metals, microbial, and potency. Your COA only shows heavy metals.

COA looks fake. No letterhead. Generic formatting. No contact info for the lab. Reviewers flag these fast.

What to do if your submission gets rejected

Don't panic. It's fixable. Here's the playbook:

Read the rejection reason closely. Amazon tells you why. Sometimes it's buried in a generic message — look for the actual reason.
Fix what they pointed out. If it's a format issue, convert and re-upload. If it's a metadata mismatch, correct the fields. If it's a lab credential issue, you might need a new COA from a different lab.
Don't just re-upload the same file. That gets you flagged for duplicate submissions and wastes time.
Open a case with Seller Support if the rejection reason makes no sense or if you fixed the issue but keep getting rejected. Reference your original case ID.
Consider getting a fresh COA. If your lab's credentials are the problem, find an ISO 17025 accredited third-party lab and get a new COA. It's faster than arguing with Amazon.

Pro tips that actually work

Tip 1: Upload more than they ask for. If Amazon requests a COA, also upload the lab's ISO certificate and scope of accreditation. Reviewers appreciate having everything in one submission.

Tip 2: Put all PDF pages in the right order. If your COA is 3 pages and the lab cert is 2 pages, merge them into one PDF in that order. Don't make the reviewer hunt through 5 separate files.

Tip 3: Use the same product name everywhere. The name on your listing, the name on your COA, and the name in the metadata fields should match exactly. Copy-paste if you have to.

Tip 4: Don't wait for the request. The smartest sellers get a fresh COA before listing a new supplement ASIN. That way when the documentation request hits, you upload immediately and skip the panicked "where do I get a COA" scramble.

Tip 5: Keep old COAs. Amazon can ask for documentation on products you listed 2 years ago. If you tossed the COA, you're in trouble. Archive everything.

Request quotes for this test

Need a fresh COA from an ISO 17025 accredited lab before uploading to Amazon? LabQuotes can match you with the right lab fast.

Quick Reference

Lab Category Matching

For Amazon compliance COAs, you typically need:

Heavy metals panel (lead, arsenic, cadmium, mercury)
Microbial limits (aerobic plate count, yeast/mold, pathogens per product type)
Potency/assay for claimed active ingredients
Identity testing to confirm the ingredient matches the label

Real Methods Explained

Test	Common Method	Notes
Heavy metals	USP <2232>, ICP-MS	Quantitative per element
Microbial limits	USP <2021>/<2022>	Plate count and pathogen screening
Potency/HPLC	USP monograph method	Active ingredient quantification
Identity	FTIR, HPTLC, USP method	Confirm ingredient identity
Pesticides	USP <561>, GC-MS/MS	Multi-residue panel

What Sample to Send

Finished product units — typically 10-20 units or 50-100g. The lab will provide a sample submission form specifying exact quantities for each test requested.

Expected Turnaround Time

Standard: 5-10 business days from sample receipt. Rush: 2-5 business days. Amazon document review after upload: 2-5 business days (can stretch to 2 weeks).

Accreditation Notes

Lab must be ISO/IEC 17025 accredited by an ILAC MRA signatory body. The accreditation scope must cover the tests on your COA. Submit the lab's accreditation certificate alongside your COA.

Price Ranges

Basic COA panel: $300-$600. Full compliance panel with pesticides: $800-$2,500. Rush processing: 1.5x-2x surcharge.

Country/Region Targeting

U.S. Amazon marketplace: A2LA or ANAB accredited labs preferred. European marketplaces: UKAS, COFRAC, or DAkkS accredited labs. Cross-listing in multiple Amazon regions may require separate COAs per region.

FAQ

Q: What file format does Amazon accept for COA uploads?

PDF only. Not Word, not JPEG, not a Google Drive link. A real PDF file under 10 MB with lab letterhead, accreditation info, and a unique report number.

Q: How long does Amazon take to review a submitted COA?

Officially 2-5 business days. In practice, 1-3 days for straightforward submissions and up to 2 weeks during busy periods like Q4 or Prime Day prep.

Q: What happens if my COA upload gets rejected?

Amazon provides a rejection reason. Read it carefully, fix the specific issue (format, metadata mismatch, lab credentials), and resubmit. The review clock resets, so get it right on the second try.

Q: Can I upload the same COA for multiple ASINs?

No. Each ASIN needs its own COA matching that specific product. If two products are the same formulation with different flavors or SKUs, Amazon may still ask for separate COAs per ASIN.

Q: Do I need to upload the lab's ISO certificate too?

Amazon doesn't always explicitly ask for it, but uploading the lab's accreditation certificate alongside your COA is a best practice. It gives the reviewer everything they need in one submission and reduces the chance of a follow-up request.

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How to Upload a COA to Amazon Seller Central — Step by Step