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diff --git a/mailman/interfaces/pending.py b/mailman/interfaces/pending.py
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+# Copyright (C) 2007-2008 by the Free Software Foundation, Inc.
+#
+# 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 the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+# USA.
+
+"""Interfaces for the pending database.
+
+The pending database contains events that must be confirmed by the user.  It
+maps these events to a unique hash that can be used as a token for end user
+confirmation.
+"""
+
+from zope.interface import Interface, Attribute
+
+
+
+class IPendable(Interface):
+    """A pendable object."""
+
+    def keys():
+        """The keys of the pending event data, all of which are strings."""
+
+    def values():
+        """The values of the pending event data, all of which are strings."""
+
+    def items():
+        """The key/value pairs of the pending event data.
+
+        Both the keys and values must be strings.
+        """
+
+
+
+class IPended(Interface):
+    """A pended event, tied to a token."""
+
+    token = Attribute("""The pended token.""")
+
+    expiration_date = Attribute("""The expiration date of the pended event.""")
+
+
+
+class IPendedKeyValue(Interface):
+    """A pended key/value pair."""
+
+    key = Attribute("""The pended key.""")
+
+    value = Attribute("""The pended value.""")
+
+
+
+class IPendings(Interface):
+    """Interface to pending database."""
+
+    def add(pendable, lifetime=None):
+        """Create a new entry in the pending database, returning a token.
+
+        :param pendable: The IPendable instance to add.
+        :param lifetime: The amount of time, as a `datetime.timedelta` that
+            the pended item should remain in the database.  When None is
+            given, a system default maximum lifetime is used.
+        :return: A token string for inclusion in urls and email confirmations.
+        """
+
+    def confirm(token, expunge=True):
+        """Return the IPendable matching the token.
+
+        :param token: The token string for the IPendable given by the `.add()`
+            method.
+        :param expunge: A flag indicating whether the pendable record should
+            also be removed from the database or not.
+        :return: The matching IPendable or None if no match was found.
+        """
+
+    def evict():
+        """Remove all pended items whose lifetime has expired."""