I use texts frequently to communicate with renters; about rent, repairs and about anything else. Anybody under 30 has grown up with texting being the way they communicate. Letters and phone calls are routinely ignored. I'd never send a group text that could expose their phone number to other renters and I'd quit texting should anybody ask. But nobody does. It's how people communicate these days. It also gives me a record of who said what and when.
But to a larger point I always communicate with renters about when it's due and how they will pay. I'm willing to come by if they want; many drop it in the mail or deposit to my account. Even if they do mail the payment I find a way to spend a few minutes each month talking with each tenant. I want to be a name and face, not a far away owner. It's easier to stiff the guy you don't know.
I charge above market rents to low-medium income people, many with past bankruptcies or evictions, and almost never have turnover and very rarely have a late fee. I'm their biggest monthly bill, often 30% of total income. If there's a cash flow issue I want the issue to be with the hospital or credit card company, not me. They're impersonal, I'm the guy who asks about their kids and is always asking if the cooling system is working well or when I can change the furnace filter.
Several have mentioned that the credit card or utility company never sends a reminder. That's good. That means that even though they've much smaller wallet share than my rent they go behind me in getting paid. The monthly transaction cost of a few texts and a monthly face-to-face conversation is negligible when compared to less rent, higher turnover, and higher vacancy.
My business model is a high rent, fast maintenance service, and high touch. I'm not a friend, but a businessman that makes it easy to do business with me. I charge late fees promptly on the 6th, but that is very rare and I am almost never surprised when somebody is late. Landlording is a sales business an renters are my customers. Optimizing their willingness to pay me is part of customer relationship management.