Write a letter or an email for overdue invoices

Subject: Urgent: Outstanding Payment for Invoice [#12345]

Dear [Client’s Name],

This is a follow-up regarding invoice [#12345] dated [date], totalling [amount], which remains overdue by [number of days] days.

We kindly request that payment be made by [specific deadline] to avoid any late fees or disruption to your account/services. Please find the invoice attached for your reference.

If you’ve already sent payment, please let us know the details so we can update our records accordingly. Otherwise, we’d appreciate immediate confirmation of your payment plans.

Thank you for your prompt attention to this matter.

Best Regards,
[Your Name]
[Your Position]
[Your Company Name]
[Your Contact Information]

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