diff --git a/src/main/java/net/hostsharing/hsadminng/hs/office/relation/HsOfficeRelationRbacRepository.java b/src/main/java/net/hostsharing/hsadminng/hs/office/relation/HsOfficeRelationRbacRepository.java
index 0353f02a..82e245ae 100644
--- a/src/main/java/net/hostsharing/hsadminng/hs/office/relation/HsOfficeRelationRbacRepository.java
+++ b/src/main/java/net/hostsharing/hsadminng/hs/office/relation/HsOfficeRelationRbacRepository.java
@@ -42,6 +42,7 @@ public interface HsOfficeRelationRbacRepository extends Repository<HsOfficeRelat
                 toSqlLikeOperand(mark), toSqlLikeOperand(personData), toSqlLikeOperand(contactData));
     }
 
+    // TODO: use ELIKE instead of lower(...) LIKE ...? Or use jsonb_path with RegEx like emailAddressRegEx in ContactRepo?
     @Query(value = """
             SELECT rel FROM HsOfficeRelationRbacEntity AS rel
                 WHERE (:relationType IS NULL OR CAST(rel.type AS String) = :relationType)