Signature of Seller. Next, provide the vehicle details, including make, model, and VIN.Bill of Sale to a Motor Vehicle. MV-028. Pdf, Map for TxDMV and Harris County Tax Office Main Location. MV-050. The details below should be entered into the bill of sale's highlighted fields (fillable online):. Bill of Sale: A bill of sale indicates the sale's terms, including the vehicle's identification number (VIN) and sale price. Clearly print or type all information, except signatures.