diff --git a/datev_export_xml/models/datev_export.py b/datev_export_xml/models/datev_export.py
index 239bb165..d987a070 100644
--- a/datev_export_xml/models/datev_export.py
+++ b/datev_export_xml/models/datev_export.py
@@ -357,6 +357,12 @@ def _create_activity(self):
     def action_validate(self):
         generator = self.env["datev.xml.generator"]
         for invoice in self.invoice_ids:
+            try:
+                generator._check_invoices(invoice)
+            except ValueError as e:
+                invoice.datev_validation = str(e)
+                continue
+
             try:
                 generator.generate_xml_invoice(invoice)
             except UserError: