1. Code of Virginia, Title 54.1, Chapter 21. Specifically, § 54.1-2137(A) states, "A licensee shall not be deemed to have a brokerage relationship with a party... in the absence of a written agreement between the licensee and the party." This underscores the legal preference and frequent necessity for written agreements to formally establish agency.
2. Gaddy, D., & Hart, J. A. (2023). Virginia Real Estate Practice & Law (11th ed.). Dearborn Real Estate Education. In the chapter on Agency Law, the text distinguishes between express and implied agency, identifying listing contracts and buyer representation contracts as the primary instruments for creating an express agency relationship in writing (Chapter 7, pp. 104-106).
3. Virginia Real Estate Board. (2020). Virginia Real Estate Board Licensing Regulations. 18VAC135-20-180. The regulations on Disclosure of Brokerage Relationship, while not mandating a written agreement in all scenarios, are structured around the assumption of a formal agreement. A written agreement is the best practice to ensure all required disclosures are made and acknowledged properly.