Answer:
Everyone involved in the transaction
Explanation:
As an agent of the seller, the broker has a fiduciary duty with the seller (principal) to act of behalf of his/her best interest.
But the broker must also act honestly with the buyer, if the broker closes a deal using dishonest or unfair practices, e.g. forging documents, then the buyer might claim damages from both the broker and the seller.
And of course the broker should also make sure that his/her own rights are respected and his/her work is properly paid.
