Mr. Validation

I sent validation letters to a collection agency (Automated Collection Services) and they failed to provide proof of my signature (signature not mine) and they gave me a copy of their EXPIRED business license. Their license is from 01-01-2002 to 12-31-2002. It's now mid February of 2003. Is this a violation of the Federal Credit Laws? Is so, can anyone direct me to opinions or any other relevant info that I can use against them. Thanks!!

I sent my validation letter via CMRR and I've received my green card. About 1 week after I got my green card, the collection agency called me in an attempt to collect the debt. I understand that this is a violation and I could possibly sue for $1000. When they called, I got the lady's full name and direct phone number. I also recorded the exact day/time of call. Should I act on this violation, use it against them in an effort to delete their entry, or just wait on the validation??? Any attention is appreciated!!