A disputed flag is whenever your flag was dismissed as neither helpful nor declined, or someone reviewed your flag but no conclusive action was taken. This is intended for use in cases where the validity of a flag is ambiguous.
Currently, the following scenarios result in a flag being disputed:
- An active spam or "rude or abusive" flag was cleared (but not declined) by a moderator. These flags are unique in that they can impose lasting penalties on the post and its author, so a special mechanism is provided for borderline flags to be cleared without penalizing the author or the flagger. This can also be done retroactively on already-dismissed flags, if a moderator clears all such flags on the post (both active and dismissed flags).
- A "not an answer" or "very low quality" flag kicks the post into the Low Quality Posts review queue but the final result of the review was "Looks OK".
Stack Overflow only:
- A recommend closure flag kicked the post into the Triage review queue, and the result of the review was "Looks OK" or "Needs Editing".
- A spam, "rude or abusive", or "very low quality" flag kicked the post into the Triage review queue, and the result of the review was "Needs Editing".
Disputed flags are considered neither helpful nor declined, regardless of the action taken in response to them. They do not affect a user's daily flag count and don't count toward flag bans.
See also: What is the difference between disputed and declined flags?