What ethical violation occurred when a broker submits an offer without disclosing their representation of the seller?

Submitting an offer without disclosing the broker's representation of the seller constitutes an ethical violation known as failing to disclose dual agency representation. In real estate, dual agency arises when a broker represents both the buyer and the seller in the same transaction. It is critical for the broker to inform all parties involved about this dual agency to ensure transparency and maintain trust.

The lack of disclosure can lead to conflicts of interest and potential legal repercussions. Clients must be aware of whom the broker represents to make informed decisions and to understand the broker's obligations towards them. Failure to disclose such information undermines the ethical standards expected in the profession and can detract from the integrity of the transaction.

The other options provided do not directly relate to the issue of disclosure and dual agency. For instance, failing to inquire about other properties or not touring the property with buyers are not violations directly associated with the ethical responsibilities of disclosure in representation. Similarly, not collecting a loan application copy pertains to procedural aspects rather than ethical considerations surrounding representation.