The Trailer is to be sold free and clear of any liens, encumbrances, or mortgages. Clearly print or type all information, except signatures.Bill of sale, invoice or other sales document – minimum requirements. An Alabama motor vehicle bill of sale outlines the terms of a vehicle sale between a buyer and seller. Complete and sign the Title Application Form 130-U. Signed bill of sale is required for trailers and vehicles 25 years old and older. Is a Notary or a "Bill of Sale" Needed? Head to the state's DMV website to find out what is required for the registration process. The trailers are stocked with tools to help residents remove debris, pick up litter, landscape overgrown areas, and plant trees or flowers. An authorized Lien Release if there is a lien visible on the Title.