Thus, both the Buyer and Seller must complete this application. Only businesses that are already licensed to operate a trade waste business in New York City may.CONTRACT OF SALE – OFFICE, COMMERCIAL AND MULTI-FAMILY RESIDENTIAL. PREMISES. Seller's interest in the Property includes: (1) Loss. An asset purchase agreement is a legal document used when buying or selling a small business. Read on to understand the basics. A sales agreement for buying a business is necessary for keeping both the parties on the same page and avoiding any legal trouble.