Fill out the form below and one of our team members will be in touch immediately! A security purchase agreement refers to an agreement under which one buys or sells a security, i.e.Form agreement for the purchase and sale of a division or line of business of a private US corporation, drafted in favor of the seller. An asset purchase agreement is a written legal instrument that formalizes the purchase of a business or significant business asset. A Bill of Sale substantially in the form attached hereto as Exhibit "8.3. 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.