diff --git a/app/Helpers/Epc/EpcQrGenerator.php b/app/Helpers/Epc/EpcQrGenerator.php
index 07bfc9080cd6..e0899f61ff52 100644
--- a/app/Helpers/Epc/EpcQrGenerator.php
+++ b/app/Helpers/Epc/EpcQrGenerator.php
@@ -82,13 +82,22 @@ class EpcQrGenerator
             $this->company->present()->name(),
             isset($this->company?->custom_fields?->company1) ? $this->company->settings->custom_value1 : '',
             $this->formatMoney($this->amount),
-            $this->sepa['purpose'],
+            $this->getPurposeCode(),
             substr($this->invoice->number, 0, 34),
             '',
             ' '
         ]), "\n");
     }
 
+    private function getPurposeCode(): string
+    {
+        if(isset($this->invoice->client->id_number) && strlen($this->invoice->client->id_number) > 2)
+            return $this->invoice->client->id_number;
+        
+        return $this->sepa['purpose'];
+
+    }
+    
     private function validateFields()
     {
         if (Ninja::isSelfHost() && isset($this->company?->custom_fields?->company2)) {