First reminder
Assume the payment was missed by accident. Keep it short and easy to answer.
Reminder sequence
First, second, and final invoice reminder wording.
Your first reminder should be light and helpful, your second reminder should ask for a payment date, and your final reminder should set a clear response deadline. The wording should become more specific over time without making threats or claiming legal authority you do not have.
Second reminder
Ask for a clear payment date or confirmation that payment has already been made.
Final reminder with a response deadline
Set a response deadline and decide your next internal step without making unsupported threats.
When not to send a normal reminder
Do not use a generic reminder if the invoice is disputed, the customer has raised a serious complaint, or you need legal/accounting advice. PayNudge is wording support only.