How to Fix Listing Error 90112: Invalid Attribute Format
Error 90112 occurs when a listing attribute value doesn't match Amazon's required format. This reference explains common causes like incorrect number formatting, wrong date formats, and special characters, along with step-by-step resolution guidance.
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.
Analysis & Recommendations
Why This Matters
Listing errors block products from going live and directly impact time-to-market. Sellers who understand format requirements can resolve Error 90112 quickly and prevent it from recurring across bulk uploads.
Key Takeaways
- Error 90112 means your submitted value doesn't match Amazon's required format for that field
- The error message itself tells you the correct format to use — read it carefully
- Common triggers include comma vs. decimal point in numbers and wrong date format (use YYYY-MM-DD)
- Hidden characters from spreadsheets can cause this error even when values look correct
Recommended Actions
- →Always read the full error message to identify the expected format before attempting a fix
- →Use a plain text editor to inspect flat file values for hidden characters or encoding issues
- →Download Amazon's latest category template to ensure your formatting matches current requirements
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