diff --git a/imio_teleservices_templatetags/templatetags/imio_teleservices.py b/imio_teleservices_templatetags/templatetags/imio_teleservices.py
index f07fba8..37dc8db 100644
--- a/imio_teleservices_templatetags/templatetags/imio_teleservices.py
+++ b/imio_teleservices_templatetags/templatetags/imio_teleservices.py
@@ -350,3 +350,19 @@ def condition_salle(date_heure_debut_fin, indisponibilites):
             return False
 
     return True
+
+
+####################
+# LIAISON IA.DELIB #
+####################
+@register.filter
+def format_avis(avis):
+    """
+    avis : str texte long
+    return : str
+    """
+    if avis not in (None, "None", ""):
+        avis_formate = "\n------------------------------------\n\n" + f"{avis}"
+    else:
+        avis_formate = ""
+    return avis_formate