If someone forged your name to steal money from you, you should report it to the police.  They may have committed the crimes of forgery and larceny, among others.  If that person gets arrested, they will likely have to pay restitution to you in order to resolve their criminal charges.  Another option that you have, depending on how much money is involved, is to sue them civilly.  In any event, however, time is of the essence.  Once the money is gone, you will have a much harder time getting it back.  Therefore, I suggest that you consult with the police and/or an attorney as quickly as possible.  Furthermore, I suggest that you obtain documentation of the forgery i.e., the check with the forged signature, prior to doing so so that you can show this to the officer/attorney when you speak with them.  Good luck.