Virginia transaction attorney shares how to write an effective and legally binding business purchase agreement. New businesses must file a business license application within 75 days of the date business began.Simultaneously, the escrow agent in Fairfax reviews and verifies the necessary documents related to the sale. Agreement to sell a business. Employee agreements. This Agreement of Purchase and Sale (this "Agreement") is made as of this ____ day of. Protect your business with legal contracts. Call 703-865-6100 to speak with a Northern Virginia business attorney about drafting and reviewing contracts.