[Amadou]

I'm not so sure about that. Bars have machines to scan your drivers licence and verify if its real, so why can't other companies do the same thing.

No, those machines don't work that way. They just check for integrity in the physical license itself hologram in the right place, etc -- something you can't do with a scanned copy of a license. They don't have a master database that they phone home and check in with to see if the data on the card is forged.

Actually, they do have a database - of the info they read off the cards. The bars use that info for two things: (1) if you are enough of a troublemaker, they put you on the list to reject next time. (2) they also sell all of their card scan info to the data brokers. That's right, places like Equifax, TRW, etc know the time and date of every time you went to a bar that scanned your ID.