Complaint Review: North Shore Agency

I just received a collection letter from North Shore Agency which raised my suspicion. they claimed they were collecting for Scholastic, which i actually have two accounts with, but both are paid up and didn't go way past the due date before i had paid. so as soon as i checked my account with scholastic and confirmed that their records show i'm up-to-date i searched here and found just what i suspected...hundreds of cases similar to mine. do i ignore it? report them to scholastic?

Kay
sabina, ohio, Ohio
U.S.A.