diff --git a/awx/api/serializers.py b/awx/api/serializers.py
index 25317c33de..734ce2709f 100644
--- a/awx/api/serializers.py
+++ b/awx/api/serializers.py
@@ -1493,16 +1493,35 @@ class JobCancelSerializer(JobSerializer):
 
 
 class JobRelaunchSerializer(JobSerializer):
+    passwords_needed_to_start = serializers.SerializerMethodField('get_passwords_needed_to_start')
 
     class Meta:
-        fields = ()
+        fields = ('passwords_needed_to_start',)
 
-    def to_native(self, obj):
+    def get_passwords_needed_to_start(self, obj):
         if obj:
-            return dict([(p, u'') for p in obj.passwords_needed_to_start])
-        else:
-            return {}
+            return obj.passwords_needed_to_start
+        return ''
 
+    def validate_passwords_needed_to_start(self, attrs, source):
+        obj = self.context.get('obj')
+        data = self.context.get('data')
+
+        # Check for passwords needed 
+        needed = self.get_passwords_needed_to_start(obj)
+        provided = dict([(field, data.get(field, '')) for field in needed])
+        if not all(provided.values()):
+            raise serializers.ValidationError(needed)
+
+        data.clear()
+        data.update(provided)
+        return attrs
+
+    def validate(self, attrs):
+        obj = self.context.get('obj')
+        if not obj.credential or obj.credential.active == False:
+            raise serializers.ValidationError(dict(credential=["Credential not found or deleted."]))
+        return attrs
 
 class AdHocCommandSerializer(UnifiedJobSerializer):
 
diff --git a/awx/api/views.py b/awx/api/views.py
index d18c5ae6ea..e01125e1a2 100644
--- a/awx/api/views.py
+++ b/awx/api/views.py
@@ -1843,7 +1843,7 @@ class JobCancel(RetrieveAPIView):
         else:
             return self.http_method_not_allowed(request, *args, **kwargs)
 
-class JobRelaunch(GenericAPIView):
+class JobRelaunch(RetrieveAPIView, GenericAPIView):
 
     model = Job
     serializer_class = JobRelaunchSerializer
@@ -1854,23 +1854,16 @@ class JobRelaunch(GenericAPIView):
     def dispatch(self, *args, **kwargs):
         return super(JobRelaunch, self).dispatch(*args, **kwargs)
 
-    def get(self, request, *args, **kwargs):
-        obj = self.get_object()
-        data = {}
-        data['passwords_needed_to_start'] = obj.passwords_needed_to_start
-        return Response(data)
-
     def post(self, request, *args, **kwargs):
         obj = self.get_object()
         if not request.user.can_access(self.model, 'start', obj):
             raise PermissionDenied()
 
-        # Check for passwords needed before copying job.
-        needed = obj.passwords_needed_to_start
-        provided = dict([(field, request.DATA.get(field, '')) for field in needed])
-        if not all(provided.values()):
-            data = dict(passwords_needed_to_start=needed)
-            return Response(data, status=status.HTTP_400_BAD_REQUEST)
+        # Note: is_valid() may modify request.DATA
+        # It will remove any key/value pair who's key is not in the 'passwords_needed_to_start' list
+        serializer = self.serializer_class(data=request.DATA, context={'obj': obj, 'data': request.DATA})
+        if not serializer.is_valid():
+            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
 
         new_job = obj.copy()
         result = new_job.signal_start(**request.DATA)