Ask them if they will give you a copy of their taxpayer identification number, medical records, and all their account passwords.

When they inevitably say no, say, well, I thought you had nothing to hide.

More likely than not, though, what’s going to happen is that they are going to be too thick-headed to get it, and there’s nothing you will be able to say to convince them otherwise. And so you just have to cut off contact with that person if they don’t want to respect your privacy.

I have parted ways with old friends and made new friends because my old friends refused to understand my need for privacy and stop trying to send me unencrypted text messages, etc.

Edit: Do not compromise for family members either.