I work full time for an electronics systems contractor company.  

They can electronically set it up.  

Even then I prefer to docusign electronically.

My tenants to the lat my bank, an I have auto pay from my accounts to the appropriate loan, all at the same bank, its simple, for the tenant, and for me, I give them a deposit slip with the account name, property address, and last 4 of the account, I can log in and see they paid, and the bank even images the deposit slip, so I can verify, Be careful with services, I heard on The Dave Ramsey Show, a guy was using a service, and a tenant was paying with stolen checks electronically, because the landlord was in possession of stolen property (the money) it was confiscated, in his case 11 months worth, know the terms and conditions. 

Personally, a slightly cleaner way would be to make notes in your bank system (if it allows you), or make electronic notes on the pdf statements you can download. 

Electronic or give them a business account with deposit slips that they deposit into themselves at a local bank.

I keep an electronic copy that they can get to very easily (I use apartments.com and upload it there).

Just have a worthy real estate group that is willing, on the properties you buy using them , to set up electronic payments and late fee schedules.

There were some payments sent electronically (ach'd) to the Seller.

the by-laws might be filed and available electronically.