Guide · updated November 2026

Unpaid invoice reminder emails that actually get paid

Most late payers aren't refusing. They're prioritising. A consistent, escalating sequence moves you up the list.

The sequence

  1. Day 1 overdue, friendly: assume it slipped through, re-attach the invoice, give payment details
  2. Day 7, firm: state the days overdue, set a date, and invite them to raise any problem now
  3. Day 14, final notice: a clear deadline, and say a letter of demand comes next
  4. Day 21, letter of demand: formal, with the court or tribunal named

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More: Letter of demand for an unpaid invoice: what to include · Recovering an unpaid invoice in NSW · Recovering an unpaid invoice in Victoria · QCAT minor debt claims for unpaid invoices · Can you charge interest on late invoices? · Payment plan agreements for overdue invoices · Statutory demands: a cautious explainer