I know MB has said this should be done in a low system and at a station that may or may not have the appropriate contact, but I'll be damned if I've come across one yet and I'm searching hard.
1 in CD-33 8748, Viktorenko Holdings, ~15Ly from Shinrarta Dezhra. Its a Federation Confederacy, Tourism. Only the system being low security matters, need not be anarchy.
For me this is mostly a cleanup feature. I guess everybody know this, you are traveling a longer distance and just get interdicted a few times on the way. Formerly i avoided combat, as when i killed the pirate, i'd either have to fly to a station in the system and cash in, or be stuck with a random list of small bounties to collect all over the galaxy.
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Flying to the station for just one bounty of 20k is a waste of time but having the whole panel filled up with trivial bounty vouchers is annoying. Now i can just visit a low security station once a while and clean the panel up. That i get 75% of the money is just a bonus.
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Can't agree more with Sylow. That's exactly why I was so happy, when I arrived back from an exploration stint in the void, to be able to offload those bounties I had been carrying for months.