Yes! Receipts, I think those systems that used warmth or something use that paper. You can feel it is not normal paper.
I think It can have a blueish tint and reflects light different than normal paper.
This whole thing is nothing to panic about, but being aware is good I think
I’m not from us. I’m not you or in your situation. So don’t put too much weight on my comment: Don’t do anything black or white. It’s ok to focus on yourself and go radio silent for as long as you deem right, but cutting all ties and dooming their trump voting asses gives you nothing.
Chill, or try to.
IMO political things like voting and views should never stand between family or friends. So if discussing things like that causes trouble I have skipped the topic entirely.
Friendship/Family >>> political discussion