If you were paid an overpayment of $450 would you pay it back or use it ?
Pay it back asap ... because they can come after you for it, and if you knew it was an overpayment they can charge you with a crime for not returning it.
In most cases the overpayment is realized, and repayment is supposed to be made. Who overpaid you?
Repay it so you don't get into any trouble
I'd return that overpayment. I prefer not to steal. They'd most likely come looking for it anyways - after the error was found.
Just hang on to it and they will find there mistake and ask you for it if not your home free. Give it at least until next billing. Good Luck
return. they will usually get u a reward