Originally Posted by
Inseriousity.
I make them wait til applications re-open. 9 times out of 10 those who resign forgot why they resigned in the first place when they ask to come back so I make them write an application to prove they aren't just coming back for the title and even then it is not guaranteed they'll get a place as proven by the last batch of applications (If I had wanted I could've filled the department with old faces who wanted to return but I always like trying out fresh blood so only hired 1 of them).
Despite that, I really think it is up to the manager to hire/fire whoever they like and while it might be annoying to those who've tried really hard to get into the department, they'd have their reasons for letting said person/people back in.