Before you can use such a printer, you need to pick the printer queue and register your card. After this has been completed, you can print your documents, upon which you can release the print by placing your card on the card reader
Some printers have not gotten a card reader yet, but is still using a new printing system. Before you can use a printer on a new system for the first time, you need to pick the printer queue.
The printing service at UiO have a self-service portal where you pay for prints, delete prints and register a new card.