Is Credit Collection Services Commercial A Scam?

I just got a collection notice from Credit Collection Services Commerical for an alleged unpaid American Family Insurance Bill. The funny thing is that I changed insurance carriers in July 08 and they are claiming that the charge is for September 08. I even got a check back from American Family because I overpaid. So is this very official letter from Credit Collection Services Commercial for real or is it a scam to get money out of you. The letter has a crappy warningnotice.com lettering around the body of the letter.

The people on the phone there weren't very helpful either.

Two Wells Avenue, Dept 7250
Newton, Ma 02459

1-800-345-7498