How to Fix Amazon Feed Error 99103: Missing Product ID for Unmatched SKUs
Error 99103 occurs when a product feed contains a SKU not matched to an ASIN and no product identifier is provided. Sellers must add a valid product ID (UPC, EAN, GTIN, ISBN, or ASIN) and resubmit the feed to resolve it.
Overview
Error 99103 is a common feed processing error that Amazon sellers encounter when uploading product listings through inventory files or feeds. It occurs when a seller submits a SKU that is not already associated with an ASIN, and the listing file does not include a valid product identifier. Understanding how to resolve this error is essential for sellers who manage their catalogs through bulk uploads or API-based feed submissions.
Key Points / What Sellers Need to Know
- Root cause — This error is triggered when your inventory feed contains a SKU that Amazon cannot match to an existing ASIN, and no product identifier (such as UPC, EAN, ISBN, or ASIN) has been provided in the submission.
- Product ID requirement — Amazon requires a valid product identifier whenever it cannot automatically link a SKU to a catalog listing. Without one, the system has no way to determine which product the SKU represents.
- SKU-to-ASIN matching — If a SKU has already been matched to an ASIN in your account (from a previous successful listing), you can submit feeds without a product ID. The error only fires for unmatched SKUs.
- Feed resubmission needed — The fix requires adding the correct product identifier to your file and resubmitting the feed. Simply retrying the same file without changes will produce the same error.
How This Error Occurs
When you upload a product listing feed to Amazon — whether through a flat file, XML feed, or the Selling Partner API — Amazon attempts to match each SKU in your file to a product in its catalog. If the SKU already exists in your account and is linked to an ASIN, the system recognizes the product and processes the update normally. However, when the SKU is new or has never been successfully matched, Amazon needs a product identifier to locate or create the correct catalog entry. If that identifier is missing from your feed, the system returns Error 99103 and rejects the affected row.
This commonly happens when sellers create new listings in bulk, migrate inventory from another platform, or accidentally remove the product ID column from their flat file templates.
How to Fix Error 99103
Analysis & Recommendations
Why This Matters
Feed errors block new listings from going live, directly impacting catalog availability and sales. Sellers managing large inventories through bulk uploads need to understand and quickly resolve this error to avoid delays.
Key Takeaways
- Error 99103 fires when a SKU has no ASIN match and no product identifier is provided in the feed
- Adding a valid product ID (UPC, EAN, GTIN, ISBN, or ASIN) and resubmitting the feed resolves the error
- SKUs already matched to an ASIN do not require a product ID in subsequent feed submissions
- Private label products without standard identifiers may need a GTIN exemption through Brand Registry
Recommended Actions
- →Validate that every new or unmatched SKU in your feed includes a product identifier before submitting
- →Check your feed processing report to identify exactly which rows triggered the error
- →Consider applying for a GTIN exemption if you sell private label products without standard UPCs
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