The following is designed to maximize transparency and minimize corruption.
Firstly, the community needs to elect someone whom they trust to oversee the progress of the individual(
s) who select members of the community that have no biased connection to the defendant or separate parties. A few of these individuals are replaced after each court-case, to keep them from consolidating power.
People can refuse to pay for a court-case, whether it's because they don't agree on their selection of a judge, the results of the previous court-case, or for any other reason. The court organizers select candidates that the community will vote upon to be the judge. New applicants need to be quizzed by the organizers and previous acting judges. The judge will present his verdict to the jury first, which may include a form of punishment and giving reasons for their decision.
But if a certain percentage of the jury disagree (
Say 33%), then the judge will need to alter his sentencing and present it to them again. If the judge does not alter their verdict, then it's up to those who arranged the court session and the trusted individual to inform all those who paid for it.
If those who paid for the court disagree on the sentencing, then there may be a re-trial if there's enough demand for it (33%), when people can afford it.
However, this would be a rather expensive procedure, so it should only be used for more severe offensives. Alternatively, groups that can reconcile with multiple parties will be needed.
An example of punishment would be the loss of certain benefits, such as being banned from a paintball club for a period of time, if you used your paint-gun on someone.
Or, if someone drove their car over another's garden, wreaking it but refusing to pay for the damages, then instead of harassing the driver with the help of their friends, it would be more effective if they worked together to repair the damages.