Payment Reminders

It would be amazing to have payment reminders go out to clients, perhaps once a month, to ensure that invoices are getting paid. It might also be nice if, along with the reminders, we could have something said like, “Your payment is now due/overdue, and unless the payment isn’t made within 7 days, all future appointments will be canceled”. I don’t even know if that’s a possibility. But, at least payment reminders could go out every so often to alert clients who don’t check their email and who might have missed the initial invoice. Thank you for your consideration!!