There is no requirement, just provide lawyers with relevant evidence such as IOUs, IOUs or bank transfer vouchers for lawyers to write, and the cost is not expensive, just a few hundred dollars, and the effect is not bad. After the lawyer's letter was sent, the other party returned the money to me every few days.
Share my method with me! Alipay or WeChat, search for "Running Zheng Tong" and then select "Lawyer Letter" business, then select the required type and submit it. Under normal circumstances, it can be delivered by SF in the afternoon;