Your honor, I bought a house from XXX on date YYY. Then I got a bill from the water company saying I owe ZZZ. I found out the money was owed by him for service provided before YYY date. I want XXX to pay for the bill.
small claim court就是说大白话的地方。对方说什么法律原理,你就说”your honor,I am not a lawyer, I don't know what he really meant, but here are the facts, 然后再车轱辘话说一遍“。