Yosef Karo, Shulchan Aruch — Choshen Mishpat 14
“ If a father has a claim against his son, the son must follow the father, even though he is the defendant as will be explained (in Yoreh Deah Siman 240) . We force a powerful, rich individual to leave his city and be judged in another city, even if the court in his city is greater.Paragraph 2- If one of the parties is a scholar and knows how to write his proofs, and his adversary is an ignoramus, the scholar cannot write the claim himself when they send the issue to the beis din hagadol. ”
