Occasionally we will see a listing where it is openly disclosed that some member of the listing agent's family is the owner of the property. Why is that?
First of all, it is the right thing to do. Plus, it is the law. Arizona statutes require a real estate agent to disclose if the purchaser or seller represented is a member of the agent's immediate family. And by law, immediate family means "persons related to an individual by blood, marriage or adoption, including spouse, siblings, parents, grandparents, children and grandchildren."
And note that this works both ways. An agent representing a relative who is buying a house should disclose that as well.