where do u get a pass to access UNA?
Talk with the guy that wants food where you can sleep in the slums.
He will tell you different things including where to get a counterfeit pass, could take several in-game days since you can get only one information per day.
After that you can get 4 different counterfeits at the marketplace (the one in the slums).
Since there seems to be random chance which pass is the correct one, as well as the fact that it changes it every time you want to UNA, you should get a massage with a happy ending to reduce the stress. 😉
Actually, you're supposed to get a massage with Lin Lin after buying a counterfeit pass. It will fall out and she'll notice, pay her a small fee (I don't remember how much) and she'll bring you to the tattoo artist who will fix them for you for 500 credits each. Alternatively, if you dont want to pay 500 credits, you can fix it yourself with an ink pen one of your stats is high enough (I believe it is either senses or intelligence)