Glossary
What is an e-commerce invoice? Definition
June 4, 2026
The invoice (invoice) is the accounting and tax document that proves a sale: seller, buyer, date, number, product lines, pre-tax amounts, VAT and post-tax totals, payment terms. In e-commerce, it is generated after the payment of an order (or upon client request). Distinct from the confirmation email and the delivery note, it is used for accounting, refunds, and legal obligations.
Summary
Definition: invoice, order, receipt, quote
The invoice records a completed sale and binds the merchant to the declared amounts and taxes.
Typical disclosures (France / EU, depending on status):
Seller: company name, address, SIREN/SIRET, VAT identification number.
Buyer: name, billing address, customer VAT if B2B.
Unique, sequential invoice number, with no gaps (accounting requirement).
Issue date and date of sale if different.
Line items: description, quantity, unit price excl. tax, VAT rate, line total.
Totals: subtotal excl. tax, VAT per rate, total incl. tax.
Terms: payment term (B2B), penalties, discount if applicable.
Useful distinctions:
Invoice vs. order: the order is the operational record (logistics, after-sales service); the invoice is the fiscal sales document.
Invoice vs. confirmation email: the confirmation reassures the customer; it is not always a compliant legal invoice.
Invoice vs. delivery note: the delivery note lists the contents of the package; the invoice proves the price and VAT.
Invoice vs. quote: the quote precedes the sale; the invoice records it.
Invoice vs. receipt: the receipt proves payment; the invoice details the fiscal sale (often the two are combined).
Invoice vs. credit note: the credit note cancels or corrects an invoice (return, partial refund).
B2C invoice vs. B2B invoice: in EU B2C, an invoice is often on request; in B2B, it is mandatory and sometimes with deferred payment (B2B e-commerce).
Why invoicing is important in e-commerce
Even on an online store, the invoice structures the commercial relationship and the merchant's obligations.
Tax compliance: VAT collected, declarations, administrative audits.
Accounting: accounting document for revenue, export to accountant or ERP.
Customer request: businesses, employer reimbursements, warranties.
Disputes and After-Sales Service: official reference in the event of a refund or exchange.
Export / customs: commercial invoice attached to the international package.
B2B Trust: 30-day payment, reminders, purchase order reconciliation.
Legal archiving: retention of invoices for a mandatory period (France: 10 years for accounting documents).
An incorrect invoice (wrong VAT, inconsistent numbering, missing information) complicates audits and credit notes. The invoice number must remain distinct from the Shopify order number.
The role of the invoice in the e-commerce journey
Classic e-commerce billing workflow:
First, the customer pays at checkout.
Next, the order is registered (paid).
Then, the invoice is generated automatically or on demand.
Next, the PDF is sent by email or downloaded via the customer account.
Finally, accounting export (monthly) to software or an accounting firm.
Finally, a credit note is issued in case of a return or cancellation.
Common types:
Sales invoice: standard B2C or B2B sale.
Proforma invoice: before shipping, often for export or advance payment.
Deposit invoice: partial payment before delivery.
Credit note: full or partial cancellation of an existing invoice.
For example: a Shopify B2C household appliance store, France. Order #3051, €249 VAT included, paid by card. Shopify confirmation email sent (summary, not a full tax invoice). A professional customer requests an invoice with their SIRET number from customer service. The merchant generates a PDF via a billing app (number FAC-2026-0847, detailed 20% VAT, billing address Paris). The PDF is attached to an email and made available in the customer account. End of the month: CSV export of invoices to QuickBooks for the accounting firm.
Invoice management on Shopify
Shopify manages taxes and orders; a compliant invoice often relies on apps or integrations (Shopify Help Center, Taxes).
Shopify Taxes: EU VAT, OSS, country-specific rules (Markets).
Order Printer / Packing slip: order documents, not always a legally compliant invoice in France.
Billing Apps: Sufio, Invoice Hero, Order Printer Pro (compliant PDF, sequential numbering).
Shopify Plus B2B: wholesale invoices, deferred payment, draft orders.
Accounting: sync QuickBooks, Xero, Sage via apps.
Electronic Invoicing: ongoing reform in France (B2B); check obligations according to your status and legal timeline.
Merchant Checklist France:
First, fill in the store's legal notices and VAT number in the admin panel.
Next, configure product VAT rates and zones (France, EU, export).
Then, choose an app or process for sequential invoice numbering.
Next, allow invoice downloads from the customer account or automated emails.
Finally, process credit notes linked to Shopify returns (product return).
Finally, archive PDFs for the legally required duration, outside of Shopify if necessary.
Shopify does not replace a chartered accountant: validate your VAT and billing setup based on your sales countries and legal status.
The key takeaways about e-commerce invoicing
Invoice = accounting and tax document proving a sale (excl. tax, VAT, incl. tax).
Distinct from order, email confirmation, delivery note, quote.
Issues: VAT compliance, accounting, after-sales service, B2B, archiving.
Shopify: taxes + billing apps (Sufio, etc.), accounting sync.
Sequential numbering, credit notes for refunds, legal notices.
Related terms, FAQ, and useful resources
Associated terms
Order: operational source of the invoice.
Delivery note: parcel document, non-tax.
Billing address: contact details on the invoice.
E-commerce quote: step before invoice.
Refund request: often triggers a credit note.
FAQ
Shopify invoice and order: same number?
No. The order number (#1001) is used for logistics and customer service. The invoice has its own sequential numbering required by accounting (e.g. INV-2026-0123).
Do I need to send an invoice to every B2C customer?
In France, a B2C invoice is not always systematically mandatory, but the customer can request it. Offering easy access (PDF via customer account) limits customer service requests and strengthens professionalism.
Is the Shopify confirmation email an invoice?
Generally no: it is an order summary. A compliant invoice includes the legal notices and tax numbering required; use a dedicated app if needed.
How to generate invoices on Shopify?
Configure taxes in the admin, then install an invoicing app (Sufio, Invoice Hero…) for automatic PDFs, numbering, and accounting export. Validate the setup with your accountant.
Going further
Return to Qstomy e-commerce glossary.
Sources: Shopify Help Center (Taxes), accounting and invoicing obligations France / EU (consult an accountant for your specific case).
Enzo
13 May 2026
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