FairInvoice does one job properly: it creates accurate invoices for every order and delivers them automatically. Taxes are calculated line by line and rounding is unit-tested, so the totals on your invoices match your orders to the cent. Invoice and credit note numbers are sequential and gapless, the way accountants expect. Once issued, a document never changes. Refunds get proper credit notes, and any date range can be exported as a single ZIP for your accountant.

• VAT-correct, cent-accurate PDF invoices with line-level tax and tested rounding
• Invoice emailed automatically after payment, with the real PDF attached
• Gapless, sequential invoice and credit note numbering — audit-friendly
• Bulk export any date range as a single ZIP
• Add your logo, brand color, and business details to every invoice