diff --git a/addons/point_of_sale/static/src/js/models.js b/addons/point_of_sale/static/src/js/models.js
index 63789cf5625..a7507d5629f 100644
--- a/addons/point_of_sale/static/src/js/models.js
+++ b/addons/point_of_sale/static/src/js/models.js
@@ -938,6 +938,10 @@ function openerp_pos_models(instance, module){ //module is instance.point_of_sal
                 this.trigger('change:selected',this);
             }
         },
+        // returns the payment type: 'cash' | 'bank'
+        get_type: function(){
+            return this.cashregister.journal.type
+        },
         // returns the associated cashregister
         //exports as JSON for server communication
         export_as_JSON: function(){
diff --git a/addons/point_of_sale/static/src/js/screens.js b/addons/point_of_sale/static/src/js/screens.js
index ed7110ceb14..5579d20f7c5 100644
--- a/addons/point_of_sale/static/src/js/screens.js
+++ b/addons/point_of_sale/static/src/js/screens.js
@@ -1263,6 +1263,17 @@ function openerp_pos_screens(instance, module){ //module is instance.point_of_sa
                 return;
             }
 
+            var plines = currentOrder.get('paymentLines').models;
+            for (var i = 0; i < plines.length; i++) {
+                if (plines[i].get_type() === 'bank' && plines[i].get_amount() < 0) {
+                    this.pos_widget.screen_selector.show_popup('error',{
+                        'message': _t('Negative Bank Payment'),
+                        'comment': _t('You cannot have a negative amount in a Bank payment. Use a cash payment method to return money to the customer.'),
+                    });
+                    return;
+                }
+            }
+
             if(!this.is_paid()){
                 return;
             }