You are in frequent contact with people in the segment of society that your chosen quarries move through. These people might be associated with the criminal underworld, the rough-and-tumble folk of the streets, or members of high society. This connection comes in the form of a contact in any city you visit, a person who provides information about the people and places of the local area.
Use the tables for the criminal background in the Player's Handbook as the basis for your bounty hunter's traits and motivations, modifying the entries when appropriate to suit your identity as a bounty hunter.
For instance, your bond might involve other bounty hunters or the organizations or individuals that employ you. Your ideal could be associated with your determination always to catch your quarry or your desire to maintain your reputation for being dependable.