Coexisting with Germanized — when (and when not) to add invoice9

Germanized is different from the other plugins on this list. It's not primarily an invoice plugin — it's the canonical German legal-compliance plugin for WooCommerce, with checkout disclosure text, B2B/B2C handling, age verification, GDPR-compliant double-opt-in, and yes, optionally an invoicing module in Germanized Pro.

If you're already running Germanized, the question isn't "switch to invoice9" — it's "do I add invoice9 alongside, and for what?"

When you don't need invoice9

If all of these apply, Germanized Pro alone is fine:

• You sell only B2B in Germany (no France, no cross-border B2B)
• You don't sell to German federal/state agencies (no XRechnung B2G requirement)
• The Germanized invoice template visual style works for your brand
• You're already paying for Germanized Pro

In that case, just turn on Germanized Pro's invoicing module. It ships ZUGFeRD via the Pro tier and is well-integrated with the rest of Germanized's compliance stack.

When invoice9 adds value alongside Germanized

• You sell to French B2B customers. Germanized Pro doesn't ship Factur-X. invoice9 does. The Sep 2026 French mandate is real for any French business buyer.
• You sell to German B2G (federal or state agencies). Germanized Pro ships ZUGFeRD; invoice9 also ships XRechnung UBL + CII (the pure-XML B2G format). If your B2G mix is non-trivial, the format coverage matters.
• You sell on PEPPOL (Belgian B2B mandate, Dutch and German cross-border). invoice9 ships PEPPOL BIS 3.0 invoice + credit note; Germanized doesn't.
• You're price-sensitive on the Germanized side. If you don't need Germanized Pro's other modules (B2B/B2C dynamic pricing, age verification, etc.), invoice9 standalone at $50/year is cheaper than the Germanized Pro bundle for the invoicing module alone.
• You sell on multiple platforms (Shopify + WooCommerce). invoice9 runs identically on both; same templates, same e-invoice library. Germanized is WooCommerce-only.

The Coexistence pattern

invoice9 detects Germanized on activation and shows a Coexistence card with this guidance:

Germanized Pro can also generate invoices. If you use Germanized for legal-text + checkout but want invoice9 for invoice generation, disable Germanized's invoice module under Germanized → General → Documents.

The most common configuration we see:

• Germanized handles: checkout legal text, double-opt-in, B2B/B2C customer handling, German tax-display rules, age verification (when relevant), the rest of the German compliance surface
• invoice9 handles: invoice generation in country-specific formats (ZUGFeRD, XRechnung, Factur-X, PEPPOL), the structured-XML side

They coexist cleanly because Germanized's invoicing module is optional and toggleable.

The 10-minute setup

1. Install invoice9 from the WooCommerce Marketplace.
2. Open WooCommerce → Settings → invoice9. The Coexistence card detects Germanized.
3. Configure your seller info. Most fields will mirror what Germanized already has — company name, VAT ID, address, IBAN, BIC. invoice9 doesn't auto-copy from Germanized because their options live under several keys; we surface the per-vendor guidance and link to their settings page so you can copy manually.
4. Choose default e-invoice format. Auto recommended. If your primary buyer is German B2B, this resolves to ZUGFeRD. If French B2B, Factur-X. If German B2G, you'll likely override per-order to XRechnung.
5. Disable Germanized's invoice module (if you want invoice9 to own invoicing exclusively): Germanized → General → Documents → uncheck "Enable invoice generation". If you prefer to keep Germanized issuing invoices for some buyer segments, leave it on but disable Germanized's email-attachment for the segments you want invoice9 to handle.
6. Generate a test invoice from a recent completed order.
7. Done. Germanized continues to handle everything else; invoice9 handles structured-format invoice generation.

Frequently asked questions

Should I uninstall Germanized?

No. If you sell to German customers, you almost certainly want Germanized for the rest of its functionality (checkout legal text, withdrawal-period handling, etc.). The advice is to disable Germanized's invoice module, not the whole plugin.

Will my numbering sequence transfer from Germanized?

Set invoice9's number template to match Germanized's format and the starting counter to continue Germanized's last number. GoBD permits gaps so a small reset isn't a compliance issue, but most merchants want continuity for their accountant.

Can both plugins generate invoices side-by-side for different segments?

Technically yes — you could configure Germanized for B2C and invoice9 for B2B by disabling each plugin's email attachment for the opposite segment. We don't recommend this; it's complex to audit. Pick one plugin per invoice-flow.

What about Germanized's German legal compliance text?

invoice9 doesn't replace any of Germanized's checkout-side compliance handling. Imprint, withdrawal policy, T&Cs, age verification, B2C tax inclusivity rules — all stay with Germanized.