Weapon dockets are coupons that you can exchange in the game for unique, top-tier weapons.

Most dockets were pre-order bonuses obtained when registering your Dying Light pre-order at dockets.dyinglightgame.com before the end of January 2015. We sometimes issue additional dockets during various Dying Light "events"It is possible transfer them to the game, and then exchange them at the Quartermaster's in Dying Light.

First you need to link your account to the platform you’ll be playing on.

 After your accounts are linked, your weapon dockets can be transferred to your game.

   In Dying Light, go to the Quartermaster – you’ll meet him within the first hour of the game. 

The Quartermaster can be found on the first floor of the Tower. Talk to him to exchange your dockets for unique, top-tier weapons.

What weapons will U get?

For each docket, you’ll get a weapon from one of the three higher tiers in Dying Light: rare (blue), exceptional (purple), and legendary (orange).
As remaining two lower tier are not included, you can be sure to get a hard-to-come-by weapon that will be a great asset in combat.

Remember that the Quartermaster provides you with weapons tailored to your experience level, so you might consider saving some dockets for later in the game when things will get really ugly.