Nope. Fair Credit (http://www.ftc.gov/bcp/edu/pubs/consumer/credit/cre18.shtm) covers you there. Debt collectors may not disclose details of a debt to any third party (note, however, that if you are married your spouse is not a third party). Reading around, it's also illegal to threaten you, particularly with an arrest, and it is also illegal for them to provide you with false identification. Looks to me like either a desperate debt collector or a scam.
i received a call from this mrs jackson to 4-13-2011 she said that my sis was going to jail and that there was a warrent out for her they been looking for this lady for years so just make sure you dont fall this scam