<prompt> Human: Ive had and loved my Discover card for six years. Never had an issue before. Last week, I noticed three almost 100 charges 99, 99.80, 99.85 from gas stations in a state Ive never been to. I still have my card and never lost it. I called Discover to let them know I did not authorize those charges. They were helpful and let me know I am not liable for those charges, to stop using my current card, and that theyd send me another card. Yesterday, I got a Mint notification that my credit score had dropped from 780 to 710, because Discover closed my longest line of credit, and I went from an average 4 year history to under 1. I plan on trying to call back tomorrow to ask to reopen the account but issue a different card. Is this possible or is there something else I can do? I may need that credit to buy a home in a few years. If I need to rebuild I plan on applying for a few cards now so I wont take another average age hit in the future. I dont think I should have to take a major credit hit because of a fraud that wasnt my fault. Any help would be appreciated!!TL;DR - Discover closed my account and credit scores dropped because of the updated account history factor. What can I do to raise it again?  <response>: I think Mint is wrong. I have lost my Discover card twice in the last 10 years, and closed once for fraud before that. Each time they closed that card and reissued a new one with new numbers. On my credit report, it says Discover is my oldest credit card with the date that I opened my original account. 