I let them run to the end of the year as m-t-m, then send a rent raise letter, usually for $25 or $50, on or about Nov 1, effective Jan 1. 

Some may give you owners address if different from the property, some may integrate with post card and yellow letter mailings. 

In fact, lunch is delivered to them."

FB marketplace can deliver tenants as well.

Also, its much cheaper to send a larger volume of street view postcards or letters using a large printing company than it is to send through deal machine.

I believe many contract out to the same sales company to deliver there pitches. 

Tenant estoppel letters should be used in the sale or purchase of any tenant-occupied real estate, whether residential or commercial. 

This issue alone kills many HUD dealsYour agent must fill out the request form and deliver it to the FSM with the required $$$ to de-winterize. 

I would call them and send certified letter signature required or if nearby drive to their last known address.

I appreciate the input Danielle ...I see some of these virtual mailbox companies have an app and you can see what mail has been received on the app, while others allow mail forwarding ... are you utilizing any of this or just using the physical address for your LLC paperwork to be delivered?