diff --git a/knowledge/survey/base.py b/knowledge/survey/base.py
index 7e2ebd1..a9fb732 100644
--- a/knowledge/survey/base.py
+++ b/knowledge/survey/base.py
@@ -1,5 +1,5 @@
 #
-#  Copyright (c) 2013 Helmut Merz helmutm@cy55.de
+#  Copyright (c) 2015 Helmut Merz helmutm@cy55.de
 #
 #  This program is free software; you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by
@@ -46,6 +46,9 @@ class Questionnaire(AdapterBase, Questionnaire):
 
     @property
     def questionGroups(self):
+        return self.getQuestionGroups()
+
+    def getQuestionGroups(self):
         return [adapted(c) for c in self.context.getChildren()]
 
     @property
diff --git a/organize/party.py b/organize/party.py
index 7cfd52c..fbb879c 100644
--- a/organize/party.py
+++ b/organize/party.py
@@ -24,6 +24,7 @@ from persistent.mapping import PersistentMapping
 from zope import interface, component
 from zope.app.principalannotation import annotations
 from zope.app.security.interfaces import IAuthentication, PrincipalLookupError
+from zope.app.security.interfaces import IUnauthenticatedPrincipal
 from zope.component import adapts
 from zope.interface import implements
 from zope.cachedescriptors.property import Lazy
@@ -44,6 +45,7 @@ from loops.predicate import RelationAdapter
 from loops.predicate import PredicateInterfaceSourceList
 from loops.security.common import assignOwner, removeOwner, allowEditingForOwner
 from loops.security.common import assignPersonRole, removePersonRole
+from loops.security.common import getCurrentPrincipal
 from loops.security.interfaces import ISecuritySetter
 from loops.type import TypeInterfaceSourceList
 from loops import util
@@ -59,7 +61,10 @@ def getPersonForUser(context, request=None, principal=None):
     if context is None:
         return None
     if principal is None:
-        principal = getattr(request, 'principal', None)
+        if request is not None:
+            principal = getattr(request, 'principal', None)
+        else:
+            principal = getPrincipal(context)
     if principal is None:
         return None
     loops = context.getLoopsRoot()
@@ -74,6 +79,15 @@ def getPersonForUser(context, request=None, principal=None):
     return pa.get(util.getUidForObject(loops))
 
 
+def getPrincipal(context):
+    principal = getCurrentPrincipal()
+    if principal is not None:
+        if IUnauthenticatedPrincipal.providedBy(principal):
+            return None
+        return principal
+    return None
+
+
 class Person(AdapterBase, BasePerson):
     """ typeInterface adapter for concepts of type 'person'.
     """