you even have to ask?

you already know the right thing to do.
Why havent you already returned it?
Or are you just hoping someone will say it is OK for you to keep it?
This is an interesting question as a couple of days ago someone was suggesting people need religion to give them a sense of morality.
I am an atheist.Yet the question does not even need to be asked. I already know what is right and my conscience dictates I would return it. (even if it meant going out of my way to do so.)
So to give some insight into that other thread, then,
I wonder if the OP believes in a God - and why that belief didn't already make the question unnecessary.
(Not meaning to hijack but the religious insist on the moral imperative of religion.
Maybe the OP would rather answer that privately (if at all)