I received a call from Southwest Credit Systems about a XXXX debt in the amount of {$1800.00} that some XXXX opened in my name in XXXX, PA. and said that I owe.I told them I never lived at that address in PA. and I did not give any XXXX my permission to use my SSN to open an account.They mailed me a id theft form which took two weeks to receive.I filled the form out and sent the information requested and I mailed it back to them Priority Mail with signature required.I received a letter today from the debt collector wanting me to send more information.They have all the information that I have.