Never sign up with an agent if the ask an upfront signing fee... And if they are REALLY LEGIT, and you have SEEN THEIR PREVIOUS WORK, and if they have other KNOWN ACTORS (remember, you have artistic right to ask them whom else do they represent), then they may ask for a minimum pay (only to promote you by having to mail your photographs etc. and working on your behalf)...but still then you should never pay upfront (ask to pay as you go) - to pay them as you receive work. If it's a modelling agency, then 9.9 out fo 10 times, they are fake! GOOD LUCK!!