<prompt> Human: My American express account had a limit of 500 and now randomly has a limit of 1000. I also have a capital one card and whenever I qualify for a limit increase they notify me and ask if I want my limit increased. I feel like this mightve been a mistake, although I am definitely happy about the increase. Is this common practice for American Express, or a fluke that they will overturn?  <response>: Its common for banks to do that. Nothing to worry about. 