From Longman Dictionary of Contemporary Englishif you don’t mindif you don’t mind (also if you wouldn’t mind) a) CHECK/MAKE SUREused to check that someone is willing to do something or let you do something If you don’t mind, I think I’ll go to bed now. I’d like to stay a while longer, if you don’t mind. We’ll go there together – that’s if you don’t mind. b) INTERFEREused when you are annoyed to tell someone what to do or what you are going to do Now, if you don’t mind, I’d like to get back to bed. c) used humorously or rudely to correct something someone has said The name’s John, not Jonathan, if you don’t mind. d) used to refuse someone’s offer politely ‘Do you want to come for a drink?’ ‘I won’t, if you don’t mind. I’ve got a lot of work to do.’ → mind
Examples from the Corpus
if you don’t mind• I'm going to close the window, if you don't mind. 