We add the registration number into the graphic art and then print. Purchasing a Level 1 graphic kit is required to be able to choose the printed registration option.
The benefit of choosing printed registration is that the work is basically done for you - it's a one step process to install.
We send the registration number with the graphics as a separate sticker with transfer tape that you apply after installing the graphics if also purchasing a Level 1 kit which is optional.
The benefit of choosing transfer stickers is that you can purchase the registration number separate from the graphic and can remove the registration number sticker if needed.