Invalid Product ID Format

The productId you submitted is not a valid GTIN, UPC, EAN, or ISBN. Walmart validates the check digit and length before ingesting the item.

Walmart accepts UPC (12 digits), EAN (13), GTIN-14, or ISBN. The productIdType must match the format submitted. Common failures: leading zeros stripped by Excel, non-numeric characters, wrong type declaration (sending a UPC labeled as EAN), or a checksum digit that doesn't validate.

1. Confirm the productIdType matches the actual ID format
2. Re-export with leading zeros preserved (format cells as text)
3. Validate the check digit using a GTIN calculator
4. Strip any spaces, dashes, or non-numeric characters
5. Resubmit with the corrected productId

• Excel auto-converting UPCs to scientific notation
• Submitting an internal SKU as the productId