Just bought an occupied (previous homeowner)- now what?

[Kelly Sams]

Hi! We bought our first occupied flip in Ft Mill, SC. We've been trying to get in touch with the occupants (previous homeowners) to no avail. I'm thinking we may get a response from them if I post a 24 hour notice to vacate and they think we're entering. Has anyone ever done this as means to establish communication with the occupants? Of course we can't enter (we don't have keys!), but maybe they'll be home and answer the door? Thoughts, ideas, suggestions? These folks have lived here for 10 years, so pestering neighbors and such isn't really an option either. If we don't hear anything, we will be getting an eviction landlord, though would like to avoid this route is possible. Ideas?! Thanks in advance! Kelly