Gary is RIGHT!
NO BODY should show up at your door without an appointment.
Hand them your agents card, and tell them to go way or you will be calling 911.
This is serious.
Those claiming their agent 'sent' them, should provide you the name and/or card of their agent. Failure to do so is a indication their is no agent. Call 911
Don't want to call 911? OK, take their picture. They'll evaporate.
If you do get the name and/or card, contact your agent IMMEDIATELY! Bring to bear all resources possible to ensure this agent gets the message regarding 'sending' people to an address. It is very likely the 'agent' in question is either not licensed or not a REALTOR and does not have access to the MLS. Your agents broker may be needed in this case.
Best of success,
Annette Lawrence, Broker/Associate
Remax Realtec Group
Palm Harbor, FL
Serious people call
Really serious people use reliable data sources