If a seller's listing agreement expires and they switch to another broker, what can Vivian not do?

When a listing agreement expires, the broker no longer has the authority to represent the seller or act on their behalf regarding the sale of the property. This means that, while a new broker may take over marketing and selling the property, Vivian, as the previous broker, cannot disclose any confidential information about the seller to any prospective buyers. This confidentiality is crucial to maintaining the trust and privacy of the seller's personal and financial circumstances.

Vivian's obligation to keep the seller's information confidential extends beyond the expiration of the listing agreement. Disclosing confidential information could harm the seller's position in negotiations or cause them to lose leverage. Therefore, under ethical and legal standards, she must refrain from sharing any details that could compromise the seller's interests with new potential buyers or the new broker.

The other responses relate to actions that can be taken in different scenarios. For instance, marketing the property may be executed by the new broker; contacting the seller for new offers should be done by the new representation; and representing the buyer can happen as long as it does not conflict with her previous obligations to the seller. Each of these actions is permissible in certain contexts, but sharing the seller's confidential information is strictly prohibited for Vivian in this situation.