Polite Reminder reply
I hope you are well. This is a friendly reminder that invoice [number], due on [date], remains outstanding. Please let me know when payment is expected or if you need another copy.
Work
Reply to a Client About a Payment Delay
Polite but clear responses about overdue or delayed payments. Choose the tone that fits your situation, then copy and personalize it.
Firm reply
Invoice [number] is now overdue. Please arrange payment by [date] or contact me today if there is an issue preventing settlement.
Understanding reply
Thank you for the update. I understand delays can happen. Please confirm the revised payment date so I can update my records.