diff --git a/libervia/backend/tools/common/template.py b/libervia/backend/tools/common/template.py
index 5ed6e67c..33ace89b 100644
--- a/libervia/backend/tools/common/template.py
+++ b/libervia/backend/tools/common/template.py
@@ -501,6 +501,7 @@ class Renderer:
         # custom filters
         self.env.filters["initials"] = self._initials
         self.env.filters["bare_jid"] = self._bare_jid
+        self.env.filters["jid_resource"] = self._jid_resource
         self.env.filters["next_gidx"] = self._next_gidx
         self.env.filters["cur_gidx"] = self._cur_gidx
         self.env.filters["date_fmt"] = self._date_fmt
@@ -804,6 +805,10 @@ class Renderer:
         """Return the bare JID"""
         return str(jid.JID(str(full_jid)).bare)
 
+    def _jid_resource(self, full_jid: str | jid.JID) -> str:
+        """Return the resource part of the JID"""
+        return jid.JID(str(full_jid)).resource or ""
+
     def _initials(self, name: str) -> str:
         """Return the uppercased initials of a name."""
         name_parts = name.strip().split()