Do you need a separate bill of sale?
Not required by law on a titled vehicle. Required if it is too old to be titled
The transfer is made by the assignment on the title. No statute makes a bill of sale mandatory for a titled vehicle, but the state's title rules list a bill of sale for a casual sale among the papers the buyer's designated agent collects. A vehicle more than 35 model years old gets no Alabama title. Then the bill of sale is the ownership document, and the buyer must keep a copy in the vehicle for the first 20 days. A valid bill of sale names both parties with their addresses, the date, the full vehicle description and VIN, the price, and both signatures. Keep your own copy. With no notice to file, it is part of your only record.
Source: Ala. Code §§ 32-8-44(a), 32-8-31; Ala. Admin. Code r. 810-5-75-.36, 810-5-1-.246