Bounty token

When a contract is believed to be broken, and assuming you have a copy of the contract, you can go to an individual responsible for up holding the law and use it to generate a Bounty Token. This token gives the possessor the right to apply consequence to the person who broke the contract. This can mean taking money or items off of them, reclaiming things from their homes, or even incapacitating them and bringing them back to face justice.

In the actual design a tax collector will have a bounty that lets them go and gather from you and so you can either trade with from them and give them whatever's owed or you can refuse in which case because of the bounty token they are allowed to collect that off of you on your own personal expense. However, that doesn’t give them the ability to take more than what was initially owed to them. So if they were to take more than what the person owed, more than what was owed, then they are committing a crime so at that point the taxpayer can get a bounty token on them.

Sheriffs
Sheriffs are separate entities to local judicial systems and are loyal to a kingdom, this means that they can punish nobles such as Counts and Dukes for crimes.