--- a/farolluz/cvrf.py	Wed Oct 08 11:35:53 2014 +0200
+++ b/farolluz/cvrf.py	Wed Oct 08 12:43:34 2014 +0200
@@ -231,18 +231,19 @@
 
 
 class CVRFAcknowledgment(object):
-    def __init__(self, name=None, organization=None, description=None,
+    def __init__(self, names=[], organizations=[], description=None,
                  url=None):
-        self._name = name
-        self._organization = organization
+        self._names = names
+        self._organizations = organizations
         self._description = description
         self._url = url
 
     def getTitle(self):
-        return "%s - %s" % (self._name, self._organization)
+        return "%s - %s" % (', '.join(self._names),
+                            ', '.join(self._organizations))
 
     def validate(self):
-        if (not self._name) and (not self._organization) and (not self._description):
+        if (not self._names) and (not self._organizations) and (not self._description):
             raise ValidationError('An Acknowledgment must have at least a Name, an Organization or a Description')