When the listing agent offers to write the buyer's offer too
Take a buyer who finds a small three bedroom through an open house, and the agent standing in the kitchen offers to write the offer herself and save everyone time, sliding across a consent to dual agency form and calling it routine. Say the buyer has no agent of their own yet, asking is 289k, and the plan is to come in around 275k with a credit toward a roof that looks close to done. The problem is structural: nobody is arguing for 275 if the same agent is also paid by the person who wants 289. Neutral information-passing sounds fine until the buyer wants to know something like whether the seller has already had one deal fall through, which the dual agent would know and the buyer wouldn't, because most dual agency consent forms explicitly bar the agent from disclosing either party's price flexibility to the other. That's the exact information the buyer wants, and the exact thing the agent is promising not to share. The decision that forces: sign and move fast on a house worth pursuing, or spend a week finding independent representation and risk losing it to another buyer.