I have to keep a land line where I live. I was getting up to six calls a DAY from people wanting money. I now screen calls through the answering machine. Most money grubbers don’t last through the first couple of words. I know I’m probably missing calls I’d like to take but they will eventually leave a message.
Did the son have a Will?
Perhaps the creditors were assuming there was some form of Probate being handled by his next of kin (parents) and they were trying to get their outstanding obligation paid too.
Knee jerk typical corporate scare tactics against a bereaved family.
It’s always about the money.