You do not have to say anything. But it may harm your defence if you do not mention when posting something which you later rely on in quote. Anything you do say may be ripped to sh*t.
Thanks for the "Heads up" on that Benny,It's not just oldies like me,or the perminently bewildered that have to watch out, a scam like that is easy to do if your a low life thieving b******!