First Day Overdue Checklist

Before you start

Day one is about a light, accurate touch — not a demand. Confirm the basics so your reminder lands as professional rather than premature.

• Check the due date has actually passed, allowing for any agreed grace period.
• Confirm no payment or remittance arrived that you have not yet matched.
• Make sure the invoice went to the right person and address.
• Check there is no open query that should be answered first.

Most first-day arrears are simple oversights, so keep the tone warm and assume good faith.

Do these today

A short, friendly nudge on day one resolves a large share of late payments on its own.

1. Send a brief reminder noting the invoice number, amount and that it is now due.
2. Attach a fresh copy of the invoice so there is no missing-paperwork excuse.
3. Include a clear, one-click way to pay.
4. Set a short new deadline, such as within five business days.
5. Log the reminder against the account with today's date.

Reusing a tidy template keeps this quick — see the Merion tools for reminder templates.

Set the follow-up

Day one is the start of a process, so put the next step in your diary now.

• Diarise a check on the new deadline date.
• Decide that if it passes, you will follow up by phone, not just email again.
• Note the account so a colleague can pick it up if you are away.

Prompt, consistent follow-up is what trains customers to pay you on time in future.

Common mistakes

Day one goes wrong when it is too aggressive or too vague. Avoid these.

• Opening with a stern demand before a polite reminder — it sours the relationship needlessly.
• Skipping the reminder entirely and hoping the customer pays eventually.
• Leaving the deadline open-ended, so there is no clean trigger to escalate.
• Forgetting to log the contact, which leaves a gap in the trail.

Keep it friendly, specific and recorded, and most invoices clear within days.