diff --git a/packages/control/chargepoint/chargepoint.py b/packages/control/chargepoint/chargepoint.py
index 328cfe899b..af93be8661 100644
--- a/packages/control/chargepoint/chargepoint.py
+++ b/packages/control/chargepoint/chargepoint.py
@@ -197,7 +197,7 @@ def _process_charge_stop(self) -> None:
                 self.chargepoint_module.fault_state,
                 self.data.get.imported,
                 self.data.set.ocpp_transaction_id,
-                self.data.set.rfid)
+                data.data.optional_data.data.ocpp.dummy_id_tag or self.data.set.rfid)
             Pub().pub("openWB/set/chargepoint/"+str(self.num)+"/set/ocpp_transaction_id", None)
         self.reset_control_parameter_at_charge_stop()
         data.data.counter_all_data.get_evu_counter().reset_switch_on_off(self)
@@ -737,14 +737,25 @@ def update(self, ev_list: Dict[str, Ev]) -> None:
                 log.exception(f"Fehler bei Ladestop,cp{self.num}")
 
             # OCPP Start Transaction nach Anstecken
+            log.info(f"OCPP Debug cp{self.num}: plug_state={self.data.get.plug_state}, "
+                     f"plug_state_prev={self.data.set.plug_state_prev}, "
+                     f"ocpp_transaction_id={self.data.set.ocpp_transaction_id}, "
+                     f"charge_state={self.data.get.charge_state}")
             if ((self.data.get.plug_state and self.data.set.plug_state_prev is False) or
                     (self.data.set.ocpp_transaction_id is None and self.data.get.charge_state)):
+                id_tag = (data.data.optional_data.data.ocpp.dummy_id_tag or
+                          self.data.set.rfid or self.data.get.rfid or self.data.get.vehicle_id)
+                log.info(f"OCPP Debug cp{self.num}: Starting transaction with id_tag={id_tag}, "
+                         f"dummy_id_tag={data.data.optional_data.data.ocpp.dummy_id_tag}, "
+                         f"chargebox_id={self.data.config.ocpp_chargebox_id}")
                 self.data.set.ocpp_transaction_id = data.data.optional_data.start_transaction(
                     self.data.config.ocpp_chargebox_id,
                     self.chargepoint_module.fault_state,
                     self.num,
-                    self.data.set.rfid or self.data.get.rfid or self.data.get.vehicle_id,
+                    id_tag,
                     self.data.get.imported)
+                log.info(f"OCPP Debug cp{self.num}: Transaction started, "
+                         f"ocpp_transaction_id={self.data.set.ocpp_transaction_id}")
                 Pub().pub("openWB/set/chargepoint/"+str(self.num) +
                           "/set/ocpp_transaction_id", self.data.set.ocpp_transaction_id)
             if self.data.get.plug_state and self.data.set.plug_state_prev is False:
diff --git a/packages/control/optional_data.py b/packages/control/optional_data.py
index 74eb0da6cd..48c3c8f2e5 100644
--- a/packages/control/optional_data.py
+++ b/packages/control/optional_data.py
@@ -117,6 +117,7 @@ class Ocpp:
     boot_notification_sent: bool = False
     _url: Optional[str] = None
     version: str = "ocpp1.6"
+    dummy_id_tag: Optional[str] = None
 
     @property
     def url(self) -> Optional[str]: