Where to Collect Bounty Claim? [duplicate]
You need to make sure you're docking at a station with the correct faction, as well as in the correct system.
If the bounty doesn't appear when you first dock, try reloading the game and check the contacts again.
You need to be docked at a station that is controlled by the Federation. Note that even if a system is controlled by the Federation, an individual station may not be.