I believe it is quite illegal for funeral homes to not perform the service they have undertaken. Sometimes they run out of money and hide a few bodies that no one is going to claim. Sometimes they’re just greedy.
There are also times when they’ll use one “slot” for another to cover things up. Note this came about due to an “anonymous tip”; I wonder how “anonymous tips” fit into The Plan and “Q” discussion of how to get things legally introduced as evidence.