

Looks like someone tried to score something from my mail.
I guess it’s possible that it got snagged on something and ripped open, but looks more to me like someone cut it and fished around for a potential payday in a “thank you” card.
EDIT: for what it’s worth, I’ve had mail/packages opened and cash stolen/gone missing before, but considering the majority of comments allude to a machine tearing it, I guess I’ll go with that theory. I guess my hope in humanity is just not all that strong these days.