I know its normal to get asked for license, registration, and proof of insurance. But why ask for the registration? When I register every year, the county sends me a sticker with the plate number and expiration date to stick on the lic plate. The cops van see the plate and date right? Plus I’m sure they run the plate when they pull you over anyway. Seems to me they already know the registration status.
So why do they still ask for the registration paper?


What’s to stop one from throwing an illicitly acquired sticker on my plate?
the plate lookup they do anyways, where they get all the info digitally
In my state they put the license plate number on the sticker to discourage easily slapping a valid one on a different plate. If someone is forging that they can probably forge the registration paperwork.