For those who have not seen/played the original, once somebody shows up, they show you they're ID and entry request. (click on the two yellow things to see them, use the folder to see his/her number) and if you find out its a fake, press the big red button and call the D.D.D(3312) by pressing the phone and entering the number.
credits to Nacho Sama for the original TNMN game. -Changed some stuff-