One or more If-* preconditions evaluated to false, so the request was not processed.
Quick facts
When does it occur
One or more If-* preconditions evaluated to false, so the request was not processed.
It belongs to the 4xx Client Error class of responses, defined in RFC7232#4.2.
Browse all codes in this class: 4xx Client Error
How to fix it
Refresh the resource and retry with current ETag/date preconditions.
Common causes
How to fix it
Double-check the URL, return to the homepage and search again, or retry later.
Refresh the resource and retry with current ETag/date preconditions.
Review access logs and permission rules for the affected path, and confirm routing and security policies.
Frequently asked questions
412 belongs to the 4xx Client Error class and is generally not cached for long; behavior is controlled by Cache-Control.
4xx Client Error: One or more If-* preconditions evaluated to false, so the request was not processed.
Sources & standards
Updated 2026-09-13
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about this tool
This page provides original, human-reviewed information about HTTP status codes such as 412, the HTTP Status Code Reference and related concepts. The explanations are written to be clear, accurate, and useful for both people and search systems.
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