What happens if money is deposited into a bank account that was forced closed?

Okay... so we know that times are hard, but I was laid off in February. Needless to say, times were hard, and my bank account was forced into overdraft and subsequently closed. I did not know that I would still be recieving a vacation check from my employeer since I am union and apparently still have my job.... Anyways, my job direct deposited my check into my forced closed account. I called my job and they said that the check was not returned as of yet. Will the bank keep my money even though is was just deposited into an account that was closed? Help.... I am not trying to cheat the bank. I am just trying to make it with the essential bills that I have to pay.