I was going through my old posts on HSM Meta and found this one where I was informed about a user getting a Citizen Patrol badge without them even having the minimum requirement of 15 reputation for flagging a post.
The moderator's reply to my query was:
"Under certain circumstances a new user is able to flag posts with less than the required 15 reputation. In this instance the user in question did indeed submit a flag. You can even see from their profile that they have 1 helpful flag. (The flag wasn't yet handled when this question was posted but has since been dealt with.)".
My question is: Under what circumstances can a user flag a post when they don't have at least 15 reputation?
I tried finding a duplicate post here on MSE. Such information may help a lot of new users who want to contribute constructively in their initial days at SE.