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.
After terrorizing me and abusing my kids for over a year, two days before his wedding to his current wife, my ex asked me if I was sure I didn’t want to get back together.