diff --git a/invenio_users_resources/notifications.py b/invenio_users_resources/notifications.py
index 7e048a2..d14054c 100644
--- a/invenio_users_resources/notifications.py
+++ b/invenio_users_resources/notifications.py
@@ -9,19 +9,52 @@
 """User specific resources for notifications."""
 
 
-from invenio_records_resources.notifications import RecipientFilter
+from invenio_accounts.models import User
+from invenio_notifications.models import Recipient
+from invenio_notifications.services.filters import RecipientFilter
 
 
 class UserPreferencesRecipientFilter(RecipientFilter):
     """Recipient filter for notifications being enabled at all."""
 
-    def run(self, recipients, **kwargs):
+    @classmethod
+    def __call___(cls, notification, recipients):
         """Filter recipients."""
-        return [
+        recipients = [
             r
             for r in recipients
-            if r.get("user", {})
+            if r.get("data", {})
             .get("preferences", {})
             .get("notifications", {})
             .get("enabled", False)
         ]
+        return recipients
+
+
+class UserRecipient:
+    def __init__(self, key):
+        """Ctor."""
+        self.key = key
+
+    def __call__(self, notification, recipients):
+        """Update required recipient information and add backend id."""
+        user = notification[self.key]
+        if isinstance(user, User):
+            if user.preferences["notifications"]["enabled"]:
+                recipients[user.id] = Recipient(data=user.dump())
+        else:
+            recipients[user.get("id")] = Recipient(data=user)
+        return recipients
+
+
+class UserEmailBackend:
+    def __call__(self, notification, recipient):
+        """Update required recipient information and add backend id."""
+        return "email"
+        # user = recipient.data
+        # rec.backends.append(
+        #     {
+        #         "backend": "email",
+        #         "to": f"{user.profile.full_name} <{user.email}>",
+        #     }
+        # )
diff --git a/tests/test_notifications.py b/tests/test_notifications.py
new file mode 100644
index 0000000..5a06789
--- /dev/null
+++ b/tests/test_notifications.py
@@ -0,0 +1,49 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2023 Graz University of Technology.
+#
+# Invenio-Users-Resources is free software; you can redistribute it and/or
+# modify it under the terms of the MIT License; see LICENSE file for more
+# details.
+
+"""Notification related tests."""
+
+from invenio_users_resources.notifications import (
+    UserPreferencesRecipientFilter,
+)
+from invenio_users_resources.records.api import UserAggregate
+
+
+# def test_user_recipient_filter(user_pub):
+#     """Test user recipient filter for notifications."""
+#     preferences_filter = UserPreferencesRecipientFilter
+
+#     u = UserAggregate.from_user(user_pub.user).dumps()
+
+#     user_notifications_enabled = u.copy()
+#     user_notifications_enabled["preferences"]["notifications"] = {
+#         "enabled": True
+#     }
+#     user_notifications_disabled = u.copy()
+#     user_notifications_disabled["preferences"]["notifications"] = {
+#         "enabled": False
+#     }
+
+#     recipient_enabled = {
+#         "user": user_notifications_enabled,
+#         "backends": [],
+#     }
+#     recipient_disabled = {
+#         "user": user_notifications_disabled,
+#         "backends": [],
+#     }
+
+#     filtered_users = preferences_filter.run(
+#         [
+#             recipient_disabled,
+#             recipient_enabled,
+#         ]
+#     )
+
+#     assert 1 == len(filtered_users)
+#     assert recipient_enabled == filtered_users[0]["user"]