I had an old credit card debt from 1999, someone apparently bought my debt and now is suing me in county court what can I do am I legally bound to pay this I am not even sure that I paid it before

[QUOTE=michelean]I had an old credit card debt from 1999, someone apparently bought my debt and now is suing me in county court what can I do am I legally bound to pay this I am not even sure that I paid it before