diff --git a/pms_api_rest/datamodels/pms_reservation.py b/pms_api_rest/datamodels/pms_reservation.py
index 3e60a8e3e..035cfd86d 100644
--- a/pms_api_rest/datamodels/pms_reservation.py
+++ b/pms_api_rest/datamodels/pms_reservation.py
@@ -74,6 +74,7 @@ class PmsReservationInfo(Datamodel):
     cancelationRuleId = fields.Integer(required=False, allow_none=True)
     toAssign = fields.Boolean(required=False, allow_none=True)
     toCheckout = fields.Boolean(required=False, allow_none=True)
+    undoOnboard = fields.Boolean(required=False, allow_none=True)
     reservationType = fields.String(required=False, allow_none=True)
 
     priceTotal = fields.Float(required=False, allow_none=True)
diff --git a/pms_api_rest/services/pms_reservation_service.py b/pms_api_rest/services/pms_reservation_service.py
index 321be80f7..9e9480a9f 100644
--- a/pms_api_rest/services/pms_reservation_service.py
+++ b/pms_api_rest/services/pms_reservation_service.py
@@ -287,6 +287,9 @@ class PmsReservationService(Component):
             reservation.confirm()
         if reservation_data.toCheckout is not None and reservation_data.toCheckout:
             reservation.action_reservation_checkout()
+        if reservation_data.undoOnboard:
+            reservation.action_undo_onboard()
+
 
     def _get_reservation_lines_mapped(self, origin_data, reservation_line=False):
         # Return dict witch reservation.lines values (only modified if line exist,