An Asset Purchase Agreement is a legally binding contract between a buyer and a seller that details the terms and conditions of the sale of a business's assets. Secure your San Antonio small business's transactions today!Our asset purchase agreements from Dan Burke are created to account for all of your assets. An asset purchase agreement is a written legal instrument that formalizes the purchase of a business or significant business asset. An asset purchase agreement (or APA) is a binding document between a buyer and seller for the purchase and sale of a company's assets. Buying or selling company assets? Use this Asset Purchase Agreement to finalize the terms of the transaction. Form 8594 is a tax document required in certain business sales where the buyer acquires assets rather than stock or equity. Filed with the Securities and Exchange Commission.