Fix wrong prefix

src/pretix/base/forms/questions.py

@@ -1415,7 +1415,6 @@ class BaseInvoiceAddressForm(forms.ModelForm):
                     if not data.get(r):
                         raise ValidationError({r: _("This field is required for the selected type of invoice transmission.")})
 
-                transmission_type.validate_invoice_address_data(data)
                 self.instance.transmission_type = transmission_type.identifier
                 self.instance.transmission_info = transmission_type.form_data_to_transmission_info(data)
             elif transmission_type.is_exclusive(self.event, data.get("country"), data.get("is_business")):

src/pretix/base/invoicing/peppol.py

@@ -204,12 +204,6 @@ class PeppolTransmissionType(TransmissionType):
         }
         return base | {"transmission_peppol_participant_id"}
 
-    def validate_invoice_address_data(self, address_data: dict):
-        # Special case Belgium: If a Belgian business ID is used as Peppol ID, it should match the VAT ID
-        if address_data.get("transmission_peppol_participant_id").startswith("0208:") and address_data.get("vat_id"):
-            if address_data["vat_id"].removeprefix("BE") != address_data["transmission_peppol_participant_id"].removeprefix("0208:"):
-                raise ValidationError({"transmission_peppol_participant_id": _("The Peppol participant ID does not match your VAT ID.")})
-
     def pdf_watermark(self) -> str:
         return pgettext("peppol_invoice", "Visual copy")
 

src/pretix/base/invoicing/transmission.py

@@ -24,7 +24,7 @@ from typing import Optional
 from django.utils.translation import gettext_lazy as _
 from django_countries.fields import Country
 
-from pretix.base.models import Invoice
+from pretix.base.models import Invoice, InvoiceAddress
 from pretix.base.signals import EventPluginRegistry, Registry
 
 
@@ -89,7 +89,7 @@ class TransmissionType:
     def invoice_address_form_fields_visible(self, country: Country, is_business: bool) -> set:
         return set(self.invoice_address_form_fields.keys())
 
-    def validate_invoice_address_data(self, address_data: dict):
+    def validate_address(self, ia: InvoiceAddress):
         pass
 
     @property

src/pretix/static/pretixbase/js/addressform.js

@@ -173,8 +173,8 @@ $(function () {
             if (!dependents.transmission_peppol_participant_id.val()) {
                 const fill_peppol_id = function () {
                     const vatId = dependents.vat_id.val();
-                    if (vatId && vatId.startsWith("BE") && dependents.transmission_type.val() === "peppol" && autofill_peppol_id) {
-                        dependents.transmission_peppol_participant_id.val("0201:" + vatId.substring(2))
+                    if (vatId && vatId.startsWith("BE") && dependents.transmission_type.val() === "peppol") {
+                        dependents.transmission_peppol_participant_id.val("0208:" + vatId.substring(2))
                     }
                 }
                 dependents.vat_id.add(dependents.transmission_type).on("change", fill_peppol_id);