diff --git a/organize/interfaces.py b/organize/interfaces.py
index cb38df2..a270565 100644
--- a/organize/interfaces.py
+++ b/organize/interfaces.py
@@ -204,6 +204,11 @@ class IRegistration(Interface):
     client = Attribute('The client registered')
 
 
+class IRegistrationTemplate(Interface):
+    """ Provides and processes data for a service registration form.
+    """
+
+
 class IResource(Interface):
     """ A resource is needed by a service to be able to work, e.g. a
         room or a bus. A resource may have a limited capacity so that
diff --git a/organize/service.py b/organize/service.py
index ba56a3c..76faf8e 100644
--- a/organize/service.py
+++ b/organize/service.py
@@ -32,6 +32,7 @@ from cybertools.util.jeep import Jeep
 from cybertools.composer.schema.interfaces import IClientManager
 from cybertools.organize.interfaces import IServiceManager
 from cybertools.organize.interfaces import IService, IScheduledService
+from cybertools.organize.interfaces import IRegistration, IRegistrationTemplate
 
 
 class ServiceManager(object):
@@ -97,11 +98,13 @@ class ScheduledService(Service):
 
 class Registration(object):
 
+    implements(IRegistration)
+
     def __init__(self, client):
         self.client = client
 
 
 class RegistrationTemplate(object):
 
-    pass
+    implements(IRegistrationTemplate)