Practical invoice guide

How to follow up on an unpaid invoice.

Confirm the facts, send a short reminder, ask for a specific payment update, and keep a record of every response. Escalate the clarity—not the hostility—and move unusual, disputed, or high-risk situations out of automation.

1. Verify the invoice before contacting the client

Check the client name, invoice number, amount, currency, due date, payment terms, recipient address, and original invoice link. Confirm that payment has not arrived through another channel. A reminder with the wrong facts creates more work and can damage trust.

2. Start with a factual reminder

Assume an ordinary delay first. Identify the invoice and due date, state that it still appears outstanding, include the invoice or payment link, and ask whether payment is already in progress. Keep the first email short enough that the requested action is obvious.

Subject: Friendly reminder: invoice INV-1042

Hi Jordan,

I’m checking in because invoice INV-1042 for $2,400 was due on July 18 and still appears outstanding. Could you let me know the expected payment timing or whether there is an issue with the invoice?

Thank you,
Alex

Use the invoice reminder templates for additional starting points.

3. Ask for a specific update

If the first reminder receives no response, reference the earlier note and ask for a payment date or the name of the person handling accounts payable. Avoid vague “just checking in” messages that do not tell the recipient what information you need.

4. Record promises and problems

Payment promised

Write down the exact promised date and pause routine reminders until you review the outcome.

Invoice disputed

Stop automated follow-up and resolve the scope, amount, deliverable, or approval issue directly.

Wrong recipient

Correct the contact and confirm who owns payment before another message is sent.

No response

Move to a more direct email or personal call according to your agreement and business judgment.

5. Know when automation should stop

Stop scheduled reminders when payment arrives, the recipient disputes the invoice, the address bounces, the client objects to the messages, or the situation requires legal or relationship judgment. Automation is useful for routine administration, not for deciding whether a debt is valid or what legal step should come next.

6. Improve the next invoice cycle

  • Put payment terms and the due date on the agreement and invoice.
  • Confirm the accounts-payable contact before work concludes.
  • Send the invoice promptly with a working payment or invoice link.
  • Choose the reminder schedule before the invoice becomes uncomfortable.
  • Keep one visible record of the invoice, messages, promises, and next action.

Our invoice reminder schedule guide shows a measured starting cadence for routine B2B follow-up.

Make the routine follow-up routine.

BillingNudge schedules the messages you approve and keeps the next action visible.

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