Summary

Yosef Karo Shulchan Aruch — Choshen Mishpat 4

But in the case of an individual in conflict with an entire community, the law is that if he is one of the townspeople they may take the law into their own hands in order to safeguard their interests, provided if they know that the law is in their favor, although they are unable to prove this before the Court of Law, — for they cannot testify since they are all interested parties in the matter.
Source: Wikisource

Yosef Karo Shulchan Aruch — Choshen Mishpat 4

And all this is where the individual who is in conflict with the community is not a scholar, but if he is a scholar where the study of the Torah is his sole profession and he has a claim in this matter on account of taxes, he is not required to give them a pledge and they too are not called actual possessors with respect to him.
Source: Wikisource

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