I am little bit confuse about OP post what actually he need to know. If OP want to report only scam then S_Therapist already answered. Even you newbie you are free to post on Scam Accusation board, just they can't post with image unless they wear copper membership. If there is strong evidence then simply anyone can post on Scam Accusation board. Since scam isn't moderated by forum DT member will handle it.

But there is few limitation for Jr. Member on others board. Like they can't read and post on Investigation board. I don't know exactly but there are more board.  Since your current rank is Member you are allow to post every board.