You lost your passport or bought your game secondhand? You need a new one, but why paying a second time if you already paid for game?
The UPlay Passport Generator 2013 is the answer:
This is the newest and best software to generate a UPlay Passport. Run the programm, select your game and generate a code. All this is FREE!!
For all XBox Gamers:
For the official XBox store you need a longer passport than the general one. However, no problem! I've generated some codes extra for you. You can download one of them by clicking the following button. Have fun playing!