Today at the train station, in return for my $3.90, I received a bottle of Coke (though I almost had to do a Homer Simpson for it) and $4.10 change (instead of just 10c). I took the money, but I'm not sure if that's what you're meant to do. If you were buying something in a shop and you were given incorrect change, you'd point it out and give it back (or would you?), but as far as I know, it's socially accepted that if a machine gives you incorrect change, you can take it, even though it's just as unjust an enrichment (and we'd certainly feel ripped off if it were the other way around).
So do you take the money and keep it? Give it to a homeless person or a charity? Leave it for the next person? Hand it in to the station attendant (or whoever's property the machine is)? What is the socially acceptable course of action when you've made a profit out of a vending machine?
So do you take the money and keep it? Give it to a homeless person or a charity? Leave it for the next person? Hand it in to the station attendant (or whoever's property the machine is)? What is the socially acceptable course of action when you've made a profit out of a vending machine?