diff --git a/InvenTree/order/api.py b/InvenTree/order/api.py
index e93c5b093f..c54476a733 100644
--- a/InvenTree/order/api.py
+++ b/InvenTree/order/api.py
@@ -287,6 +287,7 @@ class PurchaseOrderDetail(generics.RetrieveUpdateDestroyAPIView):
 
 
 class PurchaseOrderContextMixin:
+    """ Mixin to add purchase order object as serializer context variable """
 
     def get_serializer_context(self):
         """ Add the PurchaseOrder object to the serializer context """
@@ -871,13 +872,8 @@ class SalesOrderLineItemDetail(generics.RetrieveUpdateDestroyAPIView):
     serializer_class = serializers.SalesOrderLineItemSerializer
 
 
-class SalesOrderComplete(generics.CreateAPIView):
-    """
-    API endpoint for manually marking a SalesOrder as "complete".
-    """
-
-    queryset = models.SalesOrder.objects.all()
-    serializer_class = serializers.SalesOrderCompleteSerializer
+class SalesOrderContextMixin:
+    """ Mixin to add sales order object as serializer context variable """
 
     def get_serializer_context(self):
 
@@ -893,7 +889,22 @@ class SalesOrderComplete(generics.CreateAPIView):
         return ctx
 
 
-class SalesOrderAllocateSerials(generics.CreateAPIView):
+class SalesOrderCancel(SalesOrderContextMixin, generics.CreateAPIView):
+
+    queryset = models.SalesOrder.objects.all()
+    serializer_class = serializers.SalesOrderCancelSerializer
+
+
+class SalesOrderComplete(SalesOrderContextMixin, generics.CreateAPIView):
+    """
+    API endpoint for manually marking a SalesOrder as "complete".
+    """
+
+    queryset = models.SalesOrder.objects.all()
+    serializer_class = serializers.SalesOrderCompleteSerializer
+
+
+class SalesOrderAllocateSerials(SalesOrderContextMixin, generics.CreateAPIView):
     """
     API endpoint to allocation stock items against a SalesOrder,
     by specifying serial numbers.
@@ -902,22 +913,8 @@ class SalesOrderAllocateSerials(generics.CreateAPIView):
     queryset = models.SalesOrder.objects.none()
     serializer_class = serializers.SalesOrderSerialAllocationSerializer
 
-    def get_serializer_context(self):
 
-        ctx = super().get_serializer_context()
-
-        # Pass through the SalesOrder object to the serializer
-        try:
-            ctx['order'] = models.SalesOrder.objects.get(pk=self.kwargs.get('pk', None))
-        except:
-            pass
-
-        ctx['request'] = self.request
-
-        return ctx
-
-
-class SalesOrderAllocate(generics.CreateAPIView):
+class SalesOrderAllocate(SalesOrderContextMixin, generics.CreateAPIView):
     """
     API endpoint to allocate stock items against a SalesOrder
 
@@ -928,20 +925,6 @@ class SalesOrderAllocate(generics.CreateAPIView):
     queryset = models.SalesOrder.objects.none()
     serializer_class = serializers.SalesOrderShipmentAllocationSerializer
 
-    def get_serializer_context(self):
-
-        ctx = super().get_serializer_context()
-
-        # Pass through the SalesOrder object to the serializer
-        try:
-            ctx['order'] = models.SalesOrder.objects.get(pk=self.kwargs.get('pk', None))
-        except:
-            pass
-
-        ctx['request'] = self.request
-
-        return ctx
-
 
 class SalesOrderAllocationDetail(generics.RetrieveUpdateDestroyAPIView):
     """
@@ -1183,6 +1166,7 @@ order_api_urls = [
 
         # Sales order detail view
         re_path(r'^(?P<pk>\d+)/', include([
+            re_path(r'^cancel/', SalesOrderCancel.as_view(), name='api-so-cancel'),
             re_path(r'^complete/', SalesOrderComplete.as_view(), name='api-so-complete'),
             re_path(r'^allocate/', SalesOrderAllocate.as_view(), name='api-so-allocate'),
             re_path(r'^allocate-serials/', SalesOrderAllocateSerials.as_view(), name='api-so-allocate-serials'),
diff --git a/InvenTree/order/forms.py b/InvenTree/order/forms.py
index 75b6cb94ec..a08cf81ab1 100644
--- a/InvenTree/order/forms.py
+++ b/InvenTree/order/forms.py
@@ -8,28 +8,12 @@ from __future__ import unicode_literals
 from django import forms
 from django.utils.translation import gettext_lazy as _
 
-from InvenTree.forms import HelperForm
 from InvenTree.fields import InvenTreeMoneyField
 
 from InvenTree.helpers import clean_decimal
 
 from common.forms import MatchItemForm
 
-from .models import PurchaseOrder
-from .models import SalesOrder
-
-
-
-class CancelSalesOrderForm(HelperForm):
-
-    confirm = forms.BooleanField(required=True, label=_('Confirm'), help_text=_('Cancel order'))
-
-    class Meta:
-        model = SalesOrder
-        fields = [
-            'confirm',
-        ]
-
 
 class OrderMatchItemForm(MatchItemForm):
     """ Override MatchItemForm fields """
diff --git a/InvenTree/order/serializers.py b/InvenTree/order/serializers.py
index 5bd753f17f..6f6654db1f 100644
--- a/InvenTree/order/serializers.py
+++ b/InvenTree/order/serializers.py
@@ -1041,6 +1041,25 @@ class SalesOrderCompleteSerializer(serializers.Serializer):
         order.complete_order(user)
 
 
+class SalesOrderCancelSerializer(serializers.Serializer):
+    """ Serializer for marking a SalesOrder as cancelled
+    """
+
+    def get_context_data(self):
+
+        order = self.context['order']
+
+        return {
+            'can_cancel': order.can_cancel(),
+        }
+
+    def save(self):
+
+        order = self.context['order']
+
+        order.cancel_order()
+
+
 class SalesOrderSerialAllocationSerializer(serializers.Serializer):
     """
     DRF serializer for allocation of serial numbers against a sales order / shipment
diff --git a/InvenTree/order/templates/order/delete_attachment.html b/InvenTree/order/templates/order/delete_attachment.html
deleted file mode 100644
index 4ee7f03cb1..0000000000
--- a/InvenTree/order/templates/order/delete_attachment.html
+++ /dev/null
@@ -1,7 +0,0 @@
-{% extends "modal_delete_form.html" %}
-{% load i18n %}
-
-{% block pre_form_content %}
-{% trans "Are you sure you want to delete this attachment?" %}
-<br>
-{% endblock %}
\ No newline at end of file
diff --git a/InvenTree/order/templates/order/sales_order_base.html b/InvenTree/order/templates/order/sales_order_base.html
index 9abd058996..5593918a38 100644
--- a/InvenTree/order/templates/order/sales_order_base.html
+++ b/InvenTree/order/templates/order/sales_order_base.html
@@ -224,9 +224,13 @@ $("#edit-order").click(function() {
 });
 
 $("#cancel-order").click(function() {
-    launchModalForm("{% url 'so-cancel' order.id %}", {
-        reload: true,
-    });
+
+    cancelSalesOrder(
+        {{ order.pk }},
+        {
+            reload: true,
+        }
+    );
 });
 
 $("#complete-order").click(function() {
diff --git a/InvenTree/order/templates/order/sales_order_cancel.html b/InvenTree/order/templates/order/sales_order_cancel.html
deleted file mode 100644
index 2f0fe3beb1..0000000000
--- a/InvenTree/order/templates/order/sales_order_cancel.html
+++ /dev/null
@@ -1,12 +0,0 @@
-{% extends "modal_form.html" %}
-
-{% load i18n %}
-
-{% block pre_form_content %}
-
-<div class='alert alert-block alert-warning'>
-    <h4>{% trans "Warning" %}</h4>
-    {% trans "Cancelling this order means that the order will no longer be editable." %}
-</div>
-
-{% endblock %}
\ No newline at end of file
diff --git a/InvenTree/order/urls.py b/InvenTree/order/urls.py
index 9536d96963..15e7f5b1bb 100644
--- a/InvenTree/order/urls.py
+++ b/InvenTree/order/urls.py
@@ -29,7 +29,6 @@ purchase_order_urls = [
 ]
 
 sales_order_detail_urls = [
-    re_path(r'^cancel/', views.SalesOrderCancel.as_view(), name='so-cancel'),
     re_path(r'^export/', views.SalesOrderExport.as_view(), name='so-export'),
 
     re_path(r'^.*$', views.SalesOrderDetail.as_view(), name='so-detail'),
diff --git a/InvenTree/order/views.py b/InvenTree/order/views.py
index 4620c34210..73c22aca22 100644
--- a/InvenTree/order/views.py
+++ b/InvenTree/order/views.py
@@ -87,32 +87,6 @@ class SalesOrderDetail(InvenTreeRoleMixin, DetailView):
     template_name = 'order/sales_order_detail.html'
 
 
-class SalesOrderCancel(AjaxUpdateView):
-    """ View for cancelling a sales order """
-
-    model = SalesOrder
-    ajax_form_title = _("Cancel sales order")
-    ajax_template_name = "order/sales_order_cancel.html"
-    form_class = order_forms.CancelSalesOrderForm
-
-    def validate(self, order, form, **kwargs):
-
-        confirm = str2bool(form.cleaned_data.get('confirm', False))
-
-        if not confirm:
-            form.add_error('confirm', _('Confirm order cancellation'))
-
-        if not order.can_cancel():
-            form.add_error(None, _('Order cannot be cancelled'))
-
-    def save(self, order, form, **kwargs):
-        """
-        Once the form has been validated, cancel the SalesOrder
-        """
-
-        order.cancel_order()
-
-
 class PurchaseOrderUpload(FileManagementFormView):
     ''' PurchaseOrder: Upload file, match to fields and parts (using multi-Step form) '''
 
diff --git a/InvenTree/templates/js/translated/order.js b/InvenTree/templates/js/translated/order.js
index 9fe50e3548..6b163afa1e 100644
--- a/InvenTree/templates/js/translated/order.js
+++ b/InvenTree/templates/js/translated/order.js
@@ -21,6 +21,7 @@
 /* exported
     allocateStockToSalesOrder,
     cancelPurchaseOrder,
+    cancelSalesOrder,
     completePurchaseOrder,
     completeShipment,
     createSalesOrder,
@@ -246,6 +247,32 @@ function issuePurchaseOrder(order_id, options={}) {
 }
 
 
+/*
+ * Launches a modal form to mark a SalesOrder as "cancelled"
+ */
+function cancelSalesOrder(order_id, options={}) {
+
+    constructForm(
+        `/api/order/so/${order_id}/cancel/`,
+        {
+            method: 'POST',
+            title: '{% trans "Cancel Sales Order" %}',
+            confirm: true,
+            preFormContent: function(opts) {
+                var html = `
+                <div class='alert alert-block alert-warning'>
+                {% trans "Cancelling this order means that the order will no longer be editable." %}
+                </div>`;
+
+                return html;
+            },
+            onSuccess: function(response) {
+                handleFormSuccess(response, options);
+            }
+        }
+    );
+}
+
 // Open a dialog to create a new sales order shipment
 function createSalesOrderShipment(options={}) {