We signed the Bill of Sale, but he took it. 回复：回复：卖车后对方要求退车，如何处理

Sorry I can only type English using this computer. We signed the Bill of Sale (an official one (attatched to my vehicle registration form), just very brief and essential information such as date, price, sinature, NO any other statements). I didn't keep the copy, he took the original one saying that he need it to register the car in DMV.