The Torah requires that monetary disputes be adjudicated by a beis din, rabbinical court. It is permissible to exert social pressure on an individual to convince him to agree to participate in a din Torah (court case) before a beis din. However, social pressure that could cause embarrassment is not an option if the person is in the category of amisecha, your fellow (see Day 55). A person who erroneously believes that he is justified in taking someone else’s money must be set straight, but he is not a mumar (rebellious sinner). Embarrassment is not a recourse, but one may discuss the matter with anyone who can influence the person and explain that the person is involved in a monetary dispute and should be persuaded to come before a beis din.
Unlike an individual, a beis din may publicize the fact that an individual refuses to abide by its ruling or has ignored a summons to appear before it. As previously mentioned, social pressure is often the only means by which rabbinical courts can enforce their decision.