diff --git a/components/newappeal/buildsection.js b/components/newappeal/buildsection.js
index 14d8fbea..65a14f50 100644
--- a/components/newappeal/buildsection.js
+++ b/components/newappeal/buildsection.js
@@ -712,6 +712,21 @@ const validate = (values) => {
         }
     }
 
+    if (values.hasOwnProperty("pinswg_costappliedforindicator")) {
+        if (values.pinswg_costappliedforindicator == "true") {
+            if (values.pinswg_attachcostapplication == "false") {
+                if (values.hasOwnProperty("pinswg_costapplication")) {
+                    if (strippedHtml(values.pinswg_costapplication).length == 0)
+                        errors.pinswg_costapplication =
+                            "Enter submit a Cost application or select Yes to attach a separate Costs application";
+                } else {
+                    errors.pinswg_costapplication =
+                        "Enter submit a Cost application or select Yes to attach a separate Costs application";
+                }
+            }
+        }
+    }
+
     return errors;
 };
 
diff --git a/data/formsxml/planningappeals78.xml b/data/formsxml/planningappeals78.xml
index 6102af76..c3e7a791 100644
--- a/data/formsxml/planningappeals78.xml
+++ b/data/formsxml/planningappeals78.xml
@@ -312,7 +312,7 @@
 									<labels>
 										<label description="Please submit your Cost Application" hint="newappeal:new-appeal-cost-application-hint" />
 									</labels>
-									<control validation="[required]" id="pinswg_costapplication" parentField="pinswg_costappliedforindicator" parentFieldShowOnValue="true" classid="{E0DECE4B-6666-4a8f-A065-082708572369}" datafieldname="pinswg_costapplication" maxFieldLength="5000" disabled="false" />
+									<control id="pinswg_costapplication" parentField="pinswg_costappliedforindicator" parentFieldShowOnValue="true" classid="{E0DECE4B-6666-4a8f-A065-082708572369}" datafieldname="pinswg_costapplication" maxFieldLength="5000" disabled="false" />
 								</row>
 								<row>
 									<labels>