Invest in digital tools that access USPS delivery address.

Send it USPS with proof of delivery and give them three business days to respond.2.

Part of that became deliveries and, yes, many of the houses are beautiful.

That "third party" usually is enough to realize that the gig is up.Send the letter with proof of delivery required and by certified mail with signature required. 

These platforms are simply a low cost alternative (internet) to connect capital to borrowers in the credit card/consumer lending industry...just a new delivery channel. 

(c) on delivery of deed or contract sum of balance down?

Someone that is willing to teach me how to find and bring deals to their doorstep and are willing to allow me to earn some money in the process, so I will be able to, eventually, begin to invest for myself as well.

It's not an accident your at their doorstep.  

We will not send email to someone that reports our email as spam.I've cleared you from the blacklist and I'd make sure to put webmaster@biggerpockets on your email safelist to ensure future delivery of notifications and other email.

Above all this comes the merit of the property itself and your ability to delivery on the strategy.