diff --git a/app/notify_client/models.py b/app/notify_client/models.py
index 07317ef8e..4261ff057 100644
--- a/app/notify_client/models.py
+++ b/app/notify_client/models.py
@@ -265,73 +265,32 @@ class AnonymousUser(AnonymousUserMixin):
 
 class Service(dict):
 
+    ALLOWED_PROPERTIES = {
+        'active',
+        'branding',
+        'dvla_organisation',
+        'email_branding',
+        'email_from',
+        'id',
+        'inbound_api',
+        'letter_contact_block',
+        'message_limit',
+        'name',
+        'organisation_type',
+        'permissions',
+        'prefix_sms',
+        'research_mode',
+        'service_callback_api',
+    }
+
     def __init__(self, _dict):
         # in the case of a bad request current service may be `None`
         super().__init__(_dict or {})
 
-    @property
-    def id(self):
-        return self['id']
-
-    @property
-    def name(self):
-        return self['name']
-
-    @property
-    def inbound_api(self):
-        return self['inbound_api']
-
-    @property
-    def callback_api(self):
-        return self['callback_api']
-
-    @property
-    def service_callback_api(self):
-        return self['service_callback_api']
-
-    @property
-    def organisation_type(self):
-        return self['organisation_type']
-
-    @property
-    def active(self):
-        return self['active']
-
-    @property
-    def message_limit(self):
-        return self['message_limit']
-
-    @property
-    def email_branding(self):
-        return self['email_branding']
-
-    @property
-    def email_from(self):
-        return self['email_from']
-
-    @property
-    def letter_contact_block(self):
-        return self['letter_contact_block']
-
-    @property
-    def prefix_sms(self):
-        return self['prefix_sms']
-
-    @property
-    def research_mode(self):
-        return self['research_mode']
-
-    @property
-    def branding(self):
-        return self['branding']
-
-    @property
-    def dvla_organisation(self):
-        return self['dvla_organisation']
-
-    @property
-    def permissions(self):
-        return self['permissions']
+    def __getattr__(self, attr):
+        if attr in self.ALLOWED_PROPERTIES:
+            return self[attr]
+        raise AttributeError
 
     @property
     def trial_mode(self):