Which of the following is NOT a required disclosure for advertising by a real estate agent?

In the context of real estate advertising requirements for agents, disclosing the client's property history is not required information. Real estate regulations typically emphasize transparency regarding the agent's credentials, which helps build trust and ensures compliance with professional standards.

Advertising must generally include the agent's full name as it appears on their license, their license number, and the tradename under which they operate if applicable. These elements ensure that consumers can verify the agent's credentials and have clarity on whom they are dealing with during transactions.

In contrast, while a property history can provide useful information to potential buyers, it is not a mandated component of real estate advertising as required by law. Therefore, among the listed choices, the client’s property history stands out as the information that is not necessary for agents to disclose in their advertising efforts.