A buyer representation agreement is a written contract that defines the working relationship between a buyer and their agent, including how the agent is paid. Following the 2024 NAR settlement, these agreements are being used earlier and more consistently in the buying process.
For an open house, it means more visitors arrive already under a written agreement with an agent. Asking about representation at sign-in helps you tell an already-committed buyer from an open one. This is general information, not legal advice; follow your broker and state guidance.