Automate your Shopify invoices and credit notes.
An order confirmation is not an invoice, and in most of the EU that difference has a date on it now. InvoiceAnvil turns every paid order into a legal document: sequentially numbered, carrying the structured XML your accountant and the tax authority expect, written in the buyer's own language. Paid plans also email it to them.
- Factur-X
- ZUGFeRD
- UBL / PEPPOL
- EN 16931
Free plan up to 15 invoices a month. Emailed to your buyers from $9/month, UBL for PEPPOL and VIES checks from $19, each with a 14-day trial. Read-only towards your store, and it touches nothing in your theme.
- 1 file
- A PDF a human reads with the EN 16931 XML attached inside it.
- No gaps
- One continuous numbering series, the requirement every tax authority shares.
- 3 mandates
- France and Germany from the PDF on every plan. Belgium's UBL on Growth.
- $0
- Free plan up to 15 invoices a month. Paid from $9, billed by Shopify.
Why this matters in 2026
Three countries, three deadlines, one document format.
The EU is converting invoices from documents people read into data machines read. The formats are already fixed; what changes country by country is the date.
-
1 January 2025
Germany
Receiving structured B2B e-invoices is already mandatory. Issuing is phased in through 2027 and 2028 by company size. Format: ZUGFeRD or XRechnung, both EN 16931.
-
1 January 2026
Belgium
Structured B2B e-invoicing over the PEPPOL network is mandatory. Format: PEPPOL BIS, which is UBL.
-
1 September 2026
France
Every VAT-registered business must be able to receive e-invoices, and large and mid-size companies must issue them. Format: Factur-X, UBL or CII.
-
1 September 2027
France, small businesses
The obligation to issue reaches every remaining company, whatever its size. Same formats, one year later.
The honest version, because it decides whether you need this at all. These mandates cover B2B invoices between businesses established in the country. If you only ever sell to consumers, e-invoicing is not what applies to you: e-reporting is, and that is aggregated sales data, not a document per order.
Most Shopify stores are somewhere in between: mostly consumers, plus a stream of business buyers who ask for a proper invoice with their VAT number on it. Those invoices are in scope, and they are the ones this app is built for. There is a longer explanation in the France 2026 guide.
How InvoiceAnvil works
Fill in your company once. Then it runs on its own.
Set the seller block
Legal name, address, country and VAT number, printed on every document. You pick your numbering series here too: INV- for invoices, CN- for credit notes.
An order gets paid
Within seconds it becomes an invoice with the next number in the series. No gaps, no reuse: a legal series has to be continuous, so the prefix locks once the first document is issued.
A real document for the buyer
A PDF with the structured XML embedded inside it, in their language, emailed to them on paid plans. They see an invoice; their accounting software sees EN 16931 data.
What it does not do, stated plainly. InvoiceAnvil produces compliant documents. It does not transmit them to a tax authority: in France that goes through an approved platform (plateforme agréée), and in Belgium through a PEPPOL access point. Network transmission is a separate, clearly-labelled feature, not something quietly implied here.
What you get
One file that satisfies a human and a tax authority at the same time.
Factur-X and ZUGFeRD, inside the PDF
The French and German formats are the same EN 16931 standard under two names, and both are carried the same way: one hybrid file, readable as a PDF, machine-readable as XML attached inside it. Your buyer opens an invoice; their accounting software imports data from the very same file, with nothing to reconcile.
- Standard
- EN 16931
- Attachment
- factur-x.xml
- Reconciliation
- None
Gapless, sequential numbering
The requirement every tax authority shares, and the one an order number cannot satisfy. Your own prefix, one continuous series, no holes.
UBL for PEPPOL
The Belgian mandate's format, exported per document and ready to hand to an access point. Growth plan.
Buyer VAT numbers without Shopify Plus
Collected from a standard cart attribute and printed on every invoice. On Growth, checked against the EU VIES service, with reverse charge applied when it qualifies.
Credit notes on refunds
A full or partial refund produces a credit note in its own series, referencing the invoice it corrects. You never edit an issued invoice, because you are not allowed to.
One archive for your accountant
Every document for a period in a single ZIP, PDFs and XML together, so the monthly handover is one file instead of a folder trawl. Growth plan.
Pricing
Start free. Pay when the volume justifies it.
Prices in USD, billed through Shopify on your regular store invoice. Paid tiers include a 14-day free trial, and you can uninstall at any time.
Free
$0 / month
For a store with the occasional business buyer.
- 15 invoices a month
- PDF with Factur-X inside
- Credit notes on refunds
- Documents in the buyer's language
- Discreet InvoiceAnvil footer mark
Starter
$9 / month
The plan the document flow was designed around.
- Unlimited invoices
- No footer mark
- Documents emailed to your buyers
- Everything in Free
Growth
$19 / month
For stores selling across the border, to businesses.
- UBL / PEPPOL export
- Automatic VIES validation
- Accounting export as one ZIP
- 10-year archive
- Everything in Starter
FAQ
Questions merchants actually ask
Isn't the Shopify order confirmation already an invoice?
No, and this is the misunderstanding the whole app exists around. The confirmation email is a receipt of a transaction. An invoice is a legal document with mandatory content: your legal identity and VAT number, the buyer's, a sequential number from a continuous series, the tax breakdown per rate, and the legal mentions that apply to the case.
Shopify's order number is not a valid invoice number either: it is not guaranteed gapless, and it is shared with drafts and test orders. The detail is in the numbering guide.
Does it send anything to the tax authorities?
No. It produces compliant documents (Factur-X, ZUGFeRD, UBL). Transmission over a network, an approved platform in France or a PEPPOL access point in Belgium, is a separate feature and is not part of the app today.
Does it modify my orders, my theme or my storefront?
No. The app is read-only towards your store and adds nothing to your theme. The buyer VAT number is collected through a standard cart attribute, which is a field you add to your own theme if you want the B2B flow; the in-app Help page has the snippet.
What happens to my invoices if I uninstall?
Download them first. Everything is deleted 48 hours after uninstall, as the privacy policy states. That is a deliberate choice, since holding your buyers' data after you have left is the wrong default, but it does mean the export is on you.
Why can't I change the number prefix later?
Because a legal series has to stay continuous. Changing the prefix mid-series creates a break that an auditor reads as a missing invoice. It locks at the first issued document of that series; before that, change it as often as you like.
Who is behind it?
Anvil Apps, the Shopify apps of Mollenthiel Studio, a one-person software studio in Lyon, France. Support goes to a human at support@shipanvil.com, usually the same day.
The mandate is already in force.
Set your company details once, and every paid order after that is a document you can hand to an accountant without apologising for it.