It's not okay to deceive others.
Phil is out shopping when a customer stops him and asks if a $100 bill they found on the floor belongs to Phil, which it doesn't.
Phil needs to decide how to respond.
Phil says the bill is not his and offers to help find the person it belongs to.
Phil thanks the customer for finding his lost money and pockets it.
The person the bill belongs to thanks Phil for helping him find his lost money.
The person who actually owned the 100$ is standing right behind Phil and yells at him.