In sunset hills Missouri they do require the home owner or representative have a mailing adddress in the city  

Everyone seems to use email and will describe things in their own terms.

Quote from @Brandon Sarrett: What is the best way to find a phone number or email address of a property owner if you have the property address and their potential name?

I mean if you have 10 lots, you could sell 3 to recoup some cash, you could partner on 3 to get your credibility, and you could build the last 3 yourself.If you can get me the following I can get you a better idea of what you are looking at, you can also email me if you don't want your info shared on the forum.

one applicant emailed me his EIN number document from IRS !!

Many firms nowadays service all states, and through phone, email, and zoom calls you basically have everything you need.

Additionally, you blanket a neighborhood you are interested in with door knocking, direct mail campaigns.  

Direct mail.

You will have access to millions of properties, criteria filters, list building, list tagging, skip tracing , direct mailing, and emailing, and the list goes on and on.

They will also send you an email status update each month as they pay the bank your mortgage payment.