diff --git a/CHANGES.rst b/CHANGES.rst
index 11ebac5..b8bf6de 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,7 +4,8 @@ Changelog
 1.16.5 (unreleased)
 -------------------
 
-- Nothing changed yet.
+- Removed 'to_sign' and 'signed' fields from scanbehavior.
+  [chris-adam]
 
 
 1.16.4 (2025-06-24)
diff --git a/setup.py b/setup.py
index b4c9a79..3231624 100644
--- a/setup.py
+++ b/setup.py
@@ -48,10 +48,10 @@
         "plone.directives.form",
         "collective.contact.core",
         "collective.dexteritytextindexer",
-        "collective.dms.basecontent",
+        "collective.dms.basecontent>1.99",
         "imio.helpers>=0.55",
         "plone.formwidget.datetime",
-        #'plone.app.relationfield',
+        # "plone.app.relationfield",
         "five.grok",
     ],
     extras_require={
diff --git a/src/collective/dms/mailcontent/vocabularies.py b/src/collective/dms/mailcontent/vocabularies.py
index d2afa30..bcbc950 100644
--- a/src/collective/dms/mailcontent/vocabularies.py
+++ b/src/collective/dms/mailcontent/vocabularies.py
@@ -46,7 +46,10 @@ def __call__(self, context):
             else:
                 title = u"{}  (« {} »)".format(ftitle, obj.file.filename)
             # TODO Mark signed version
-            if getattr(brain, "signed", False):  # from collective.dms.scanbehavior
+            document = obj.aq_parent
+            cat_elems = getattr(document, "categorized_elements", {})  # from collective.iconifiedcategory
+            signed = cat_elems.get(brain.UID, {}).get("signed", False)
+            if signed:
                 typ = u"{} signed".format(brain.portal_type)
             else:
                 typ = brain.portal_type
@@ -80,7 +83,10 @@ def __call__(self, context):
                     title = ftitle
                 else:
                     title = u"{}  (« {} »)".format(ftitle, obj.file.filename)
-                if getattr(brain, "signed", False):  # from collective.dms.scanbehavior
+                document = obj.aq_parent
+                cat_elems = getattr(document, "categorized_elements", {})  # from collective.iconifiedcategory
+                signed = cat_elems.get(brain.UID, {}).get("signed", False)
+                if signed:
                     typ = u"{} signed".format(brain.portal_type)
                 else:
                     typ = brain.portal_type