What would you do if...

- Your friend asks you to add a few extra hours to a work time sheet for him, but you know that he did not put in the time.
As long if he came to work for that hours then yes, but if not then I wouldn't do so, because it's not fair.
- A salesperson in an electronics store offers to sell you an iPod after hours at a discounted price.
If the store is legit, and doesn't sell stolen things, then I would buy it.
- You are aware that the teller gave you back too much money when completing a banking transaction.
I would tell the teller and return the money.