What happens if SS check is automatically deposited each month, and parent passes away after the check has been deposited?

It gets automatically UNdeposited and stopped. SS reads all the death certificates and takes it back.

I thought the rule was that you have to live the entire month to get a payment in the next month. So the payment made in the month of death is for the previous month. If the person lives until after the payment is made, I think they get to keep the payment.