I've seen lots of scenarios where the correct and safe transmission of a document, either paper or electronic, is followed by exposing that document to people who shouldn't see it because on the recipient's end it gets printed out, lost, left in a cab, saved in unencrypted form, forwarded to their personal Gmail account, and too many other examples to mention.If you're sending to a bank or other corporate entity, their IT department may have an idea of how they expect to receive and store sensitive documents.  

We use electronic applications so the information is stored in our system.

@Sudhanshu SinghaThe problem is that this kind of electronic signature can be easily contested in court...

Before calling A Tech out to check it you might want to get an electronic temp gun and check the temps at the intake filter vent and at the closet register to the unit.

One of our current renters is traveling internationally immediately after leaving us and so sending it electronically would be nice.

Rentec Direct ACH's  (electronic transfer) the money through a payment provider.  

I'm a little unsure of your piping configuration for each structure to be able to better advise on a solution.You can purchase a water meter from a local plumbing supply house and install it on the line feeding that building (not that difficult to do, either), and charge them whatever your local water rates are (or more if need be).We were going to do this but the city sells an electronic read water meter for $283.

I’d say my third favorite system is electronic rent collection with cozy.

I wish I could collect electronically.

Several unsuccessful attempts have been made to request payments and have received multiple excuses (could not find the checkbook or could not send electronic payment).