Just a thought.
I know who my legit corporations are. Let me set my own nagging though.
I have thought about what you can do for me. My desire is to know my billing dates. At the beginning of the year, you have or must have set billing dates for that year. Send or make available to your clients an Excel spreadsheet which sets your billing date as an event.
And I can set my software to nag me 4 days ahead of the billing date.
That would help me move toward fewer late fees. I would appreciate being able to sign up to the Reminder, for you send this file out at the beginning of the new year.