While a Bill of Sale and a Sales Agreement provide many of the same details about a transaction, they serve very different purposes. The parties create a Sales Agreement before completing a transaction. It outlines the terms that both parties need to meet for the transaction to go through, such as details about payment plans and warranties. A ProductLink code="BOS" text="Bill of Sale" is created after the parties reach an agreement. It’s a receipt that acts as evidence that an item’s ownership has transferred from one party to another. A Bill of Sale is often one part of the Sales Agreement.