diff --git a/app/scodoc/sco_bulletins_xml.py b/app/scodoc/sco_bulletins_xml.py
index 3d4bb109..982ace4e 100644
--- a/app/scodoc/sco_bulletins_xml.py
+++ b/app/scodoc/sco_bulletins_xml.py
@@ -175,8 +175,8 @@ def make_xml_formsemestre_bulletinetud(
             doc.append(
                 Element(
                     "rang_group",
-                    group_type=partition["partition_name"],
-                    group_name=gr_name[partition["partition_id"]],
+                    group_type=partition["partition_name"] or "",
+                    group_name=gr_name[partition["partition_id"]] or "",
                     value=str(rang_gr[partition["partition_id"]]),
                     ninscrits=str(ninscrits_gr[partition["partition_id"]]),
                 )
@@ -311,7 +311,7 @@ def make_xml_formsemestre_bulletinetud(
                                 description=scu.quote_xml_attr(e["description"]),
                                 incomplete="1",
                                 # notes envoyées sur 20, ceci juste pour garder trace:
-                                note_max_origin=e["note_max"],
+                                note_max_origin=str(e["note_max"] or ""),
                             )
                             x_mod.append(x_eval)
         # UE capitalisee (listee seulement si meilleure que l'UE courante)
@@ -364,7 +364,7 @@ def make_xml_formsemestre_bulletinetud(
             decision = dpv["decisions"][0]
             etat = decision["etat"]
             if decision["decision_sem"]:
-                code = decision["decision_sem"]["code"]
+                code = decision["decision_sem"]["code"] or ""
             else:
                 code = ""
             if (