The best kind of accountability happens when nobody would ever have found out.

Behaviour with no chance of being caught is the only clean measurement of what you actually think is right. Everything else is mixed in with consequences and reputation, which are perfectly good reasons to behave well but tell you nothing about yourself. The private version is where the real answer lives.

Think of the thing nobody noticed and go and put it right. Return the extra change, tell them the score was wrong, flag the error that fell in your favour. It is small to do and it changes how you walk around.