Exact purchase price, date, and location of the sale.
Buying a Car Without a Title: What You Should Know - Experian
This is the most critical identifier for your paperwork.
If you decide to proceed, you must create a paper trail—often referred to as a "proper paper"—to protect yourself and eventually secure a new title. 1. Essential "Proper Paper": The Ironclad Bill of Sale
Before signing any papers or handing over money, perform these due diligence steps: