The ones in Cali are very difficult/near impossible to fake. The fronts where your picture, address, and DL number have several personal holographic images, your photo again, and finger print/thumb print. The strip on the back has all the same info on the front contained digitally. Plus the inside of the card has some additional qualities that only show up if a flashlight is shown through it from behind.

Our bar doormen in my town are super good at weeding out fake IDs, since we are a CA. University town. You should see the jars of fake IDs our bar guys collect at the bars. Oh yes they keep the fake ones in jars by the doors for all to see, and so they can match up if another comes along. 😂😂