Overview

Error 90112 is one of the most common listing errors Amazon sellers encounter when creating or updating product listings. This error fires when an attribute value doesn't match the format Amazon expects for that particular field. Understanding how to quickly diagnose and resolve this error can save sellers significant time and prevent listing delays.

Key Points / What Sellers Need to Know

• Format mismatch is the root cause — Error 90112 triggers whenever a submitted value doesn't conform to the exact format Amazon requires for a given attribute, such as entering text in a numeric field or vice versa.
• The error message itself contains the fix — Amazon includes the valid format directly in the error output, showing sellers exactly what structure the value needs to follow.
• Number formatting varies by marketplace — Using commas instead of decimal points (e.g., "2,5 Kg" instead of "2.5Kg") is a frequent trigger, especially for sellers listing across international marketplaces.
• Date formats must follow ISO standards — Amazon requires dates in YYYY-MM-DD format. Submitting dates as DD/MM/YYYY or MM/DD/YYYY will trigger this error.
• Special characters can silently break submissions — Hidden characters, extra spaces, or unsupported symbols copied from spreadsheets or other sources often cause this error without an obvious visual clue.

Common Causes

The most frequent scenarios that trigger Error 90112 fall into a few predictable categories. First, data type mismatches occur when sellers enter alphabetic characters into fields that only accept numbers, or submit decimal values where only whole integers are allowed. Second, formatting inconsistencies arise when values use the wrong separator characters — this is particularly common with weights, dimensions, and prices where regional conventions differ. Third, date fields are a persistent trouble spot because different systems use different date ordering conventions, but Amazon strictly enforces the YYYY-MM-DD (ISO 8601) format across its catalog. Finally, invisible characters or trailing spaces that get inadvertently pasted from external tools like Excel or Google Sheets can corrupt otherwise valid values.