A broker has a single agency relationship with the seller.

In Massachusetts, the seller is legally responsible for completing the property condition disclosure form. The listing broker or agent may provide the form and ensure it is delivered to prospective buyers, but they do not complete it on behalf of the seller.

The rationale is that the seller is the party with direct knowledge of the property’s condition. Licensees must never fill out the disclosure themselves, as this could expose them to liability for inaccuracies. The broker’s duty is limited to ensuring the disclosure is provided in accordance with Massachusetts law (M.G.L. c.93, §114) but not to make representations or complete the document.

Thus, the correct answer is A: seller.