Product identifier errors occur when Amazon cannot properly match a product to its catalog.
Common Errors
Invalid UPC
Invalid ISBN
Invalid EAN
Product not found
Identifier already assigned
Identifier mismatch
Why These Errors Happen
Incorrect barcode information
Catalog inconsistencies
Duplicate listings
Product variations being matched incorrectly
Best Practices
Verify identifiers before listing
Use the correct ASIN whenever possible
Double-check product details and variations
Summary
Most product identifier errors are caused by incorrect or conflicting product information.