I mail a questionnare out asking about the agent's performance. Maybe you can ask your Broker to do it. I ask:
How did you hear about agentx?
Did they communicate effectively with you?
Is there anything they could have done differently?
Were you satisfied overall with the experience?
Would you recommend agentx to friends?
And then I ask for short testimonial that the agent can use for marketing & if it would be ok for prospective customers of agentx's to call them for a reference
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Tanya Watson/Owner
Sellstate Performance Realty, Jacksonville, FL