Which type of transaction does not require agency disclosure?

In the context of real estate transactions, the showing of a rental unit does not require agency disclosure because it typically involves a less formal interaction between the potential tenant and the landlord or property manager. During a showing, the main focus is to allow prospective renters to view the property, and there is not yet a contractual relationship established that would necessitate disclosing the agency representation.

In contrast, the other types of transactions listed—such as the lease of commercial property, sale of residential property, and purchase of a vacant lot—often involve more complex legal relationships that require clear communication about the agent's role and obligations to the parties involved. Agency disclosure is important in these scenarios to ensure transparency and to manage the expectations of all parties regarding whom the agent represents and the fiduciary duties owed. This principle aims to prevent misunderstandings and potential conflicts of interest in more formalized transactions.