There are a few things you can do to tell if your PS4 controller is fake. The first is to check the serial number. If it doesn’t match the one on your console, it’s most likely fake. Second, look for any manufacturing defects. If there are any tears or dents in the plastic, it’s most likely fake. Finally, make sure that the buttons and sticks feel good when you press them. If they don’t, it’s most likely fake."
