FlatInvoice ‑ Auto Invoices

Invoices that send themselves — plus a download button inside your order emails. One time setup.

Install FlatInvoice and invoices start emailing your customers automatically — nothing to configure. Want more? A guided 2-minute setup adds a Download-invoice button right inside Shopify's own order confirmation emails. No code, no theme edits. Packing slips, receipts, and credit notes included. Your logo and colors on every document. Tax-ready with VAT/tax ID and automatic sequential numbering. Every invoice shows exactly what the customer paid at the time of the order.

• Invoices email themselves when an order is placed or fulfilled — zero setup
• Add a Download-invoice button to Shopify's own order emails — guided, no code
• Packing slips, receipts, and credit notes — everything in one flat plan
• Your logo on every document, brand colors picked from it automatically
• Tax-ready: VAT/tax ID line and sequential invoice numbers, automatic