diff --git a/addons/point_of_sale/static/src/js/screens.js b/addons/point_of_sale/static/src/js/screens.js
index d8e53066c1e..61c6d1cc2b8 100644
--- a/addons/point_of_sale/static/src/js/screens.js
+++ b/addons/point_of_sale/static/src/js/screens.js
@@ -430,6 +430,10 @@ function openerp_pos_screens(instance, module){ //module is instance.point_of_sa
         template:'ErrorSessionPopupWidget',
     });
 
+    module.ErrorNegativePricePopupWidget = module.ErrorPopupWidget.extend({
+        template:'ErrorNegativePricePopupWidget',
+    });
+
     module.ScaleInviteScreenWidget = module.ScreenWidget.extend({
         template:'ScaleInviteScreenWidget',
 
@@ -684,8 +688,12 @@ function openerp_pos_screens(instance, module){ //module is instance.point_of_sa
                 console.log("CANCEL_END");
                 return (new $.Deferred()).resolve();
             }
-
-            this.queue.schedule(this.start);
+            
+            if(this.pos.get('selectedOrder').getDueLeft() <= 0){
+                this.pos_widget.screen_selector.show_popup('error-negative-price');
+            }else{
+                this.queue.schedule(this.start);
+            }
 
             this.add_action_button({
                     label: 'back',
diff --git a/addons/point_of_sale/static/src/js/widgets.js b/addons/point_of_sale/static/src/js/widgets.js
index 4984ee5dda9..6038a74b35e 100644
--- a/addons/point_of_sale/static/src/js/widgets.js
+++ b/addons/point_of_sale/static/src/js/widgets.js
@@ -904,6 +904,9 @@ function openerp_pos_widgets(instance, module){ //module is instance.point_of_sa
             this.choose_receipt_popup = new module.ChooseReceiptPopupWidget(this, {});
             this.choose_receipt_popup.appendTo($('.point-of-sale'));
 
+            this.error_negative_price_popup = new module.ErrorNegativePricePopupWidget(this, {});
+            this.error_negative_price_popup.appendTo($('.point-of-sale'));
+
             // --------  Misc ---------
 
             this.notification = new module.SynchNotificationWidget(this,{});
@@ -963,6 +966,7 @@ function openerp_pos_widgets(instance, module){ //module is instance.point_of_sa
                     'error': this.error_popup,
                     'error-product': this.error_product_popup,
                     'error-session': this.error_session_popup,
+                    'error-negative-price': this.error_negative_price_popup,
                     'choose-receipt': this.choose_receipt_popup,
                 },
                 default_client_screen: 'welcome',
diff --git a/addons/point_of_sale/static/src/xml/pos.xml b/addons/point_of_sale/static/src/xml/pos.xml
index cb4d90f1671..6171869cbb4 100644
--- a/addons/point_of_sale/static/src/xml/pos.xml
+++ b/addons/point_of_sale/static/src/xml/pos.xml
@@ -351,6 +351,14 @@
         </div>
     </t>
 
+    <t t-name="ErrorNegativePricePopupWidget">
+        <div class="modal-dialog">
+            <div class="popup popup-help">
+                <p class="message">Your order has to be validated by a cashier.</p>
+            </div>
+        </div>
+    </t>
+
     <t t-name="ErrorPopupWidget">
         <div class="modal-dialog">
             <div class="popup popup-help">