Probably a boring answer but I know my grandmother’s credit card information. I live with and help take care of her, so she doesn’t mind sharing it with me. Not like I’m planning to do anything nefarious, but I guess technically it could ruin her financially.
Regularly had to use it to do work I was contracted to do.
Company went public one day, they restructured massively to become more efficient. I imagine that kind of stuff stopped then, but don’t really know.