Client reminders are a delicate art. Too aggressive and you risk damaging your business relationship. Too gentle and they produce no effect. Here are our 7 tested and approved templates.
Template 1: The Friendly Reminder (D+5)
Subject: Reminder - Invoice No.[XXX] now due
Hello [First name], I would like to remind you that invoice No.[XXX] for the amount of [amount] was due on [date]. Could you please arrange payment as soon as possible?