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Past-Due Invoice Email Template (Short & Professional)

Most past-due invoices get collected by email, and the ones that work are short. This one fits on a phone screen, puts the invoice number and amount in the subject line so it gets opened, and makes paying the easiest next step.

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The template

Subject: Invoice #[Number] past due ([$Amount])

Hi [Client Name],

Invoice #[Number] for [$Amount] was due on [Due Date] and is still showing as open on our end.

You can pay here: [Payment Link]

If it's already on its way, thanks, and please ignore this. If anything needs a second look, just reply.

[Your Name]
[Your Firm Name]

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When to use this letter

  • The invoice is a few days to a few weeks past due.
  • You normally work with this client by email.
  • You want a light nudge before sending a formal letter.

Tips

  • Put the invoice number and amount in the subject line. Accounts payable teams search by both.
  • Include a direct payment link. Every extra click costs you money.
  • Send it to the person who approves payment, and copy accounts payable if you know who that is.
  • Send it early in the week and early in the day, when inboxes are getting worked through.

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This is a general business-communication template, not legal advice. You are responsible for compliance with the laws that apply to your collections activity.