This Standard Document has integrated notes with important explanations and drafting and negotiating tips. Get full access to this document with Practical Law.A simple form asset purchase agreement (APA) for the sale and purchase of a small business, operating from a single freehold site, as a going concern. A short form agreement for the purchase and sale of all or substantially all the assets of a private US corporation, drafted in favor of the buyer. The most important document in an asset deal is the Asset Purchase Agreement (the "APA"). In this article, I will discuss the key provisions of an APA.