If you're willing to tempt fait, the best way to 'opt-out' is to tell people, when they call asking to speak to 'your name', that 'your name' sadly passed away recently.
>probably a paperwork mixed up around pensions when his ex-spouse died
filed for injunctive relief from emotional duress due to actions of defendant.
and cant speak any further as instructed by legal cousel
"I called him on the phone and he told me!"
Which is how it plays out when someone dies, generally, and the family is there dealing with the aftermath. FYI.