There are a few things you can look for to spot a fake surveillance camera. First, check to see if the camera is actually connected to anything. Fake cameras are often just props that are not actually connected to any recording device. Also, look for telltale signs of tampering, such as wires that have been cut or damaged. Finally, try to test the camera by waving your hand in front of it or making a loud noise. If the camera is real, it should react accordingly. If it doesn't, then it's probably fake.