This guide will break down the ins and outs of asset purchase agreements for multiple owners, making this complex legal topic more digestible and actionable. An asset purchase agreement, or asset sale agreement, should contain details about the business, buyer, seller, and assets acquired through the transaction.Asset Purchase Agreements (APAs) are essential documents for asset sales, but they're far more complex than a simple transaction. Buying or selling company assets? Use this Asset Purchase Agreement to finalize the terms of the transaction. Any newly formed affiliate assignee buyer must expressly assume, in writing, all obligations of the original buyer under the purchase agreement.