diff --git a/src/ploneintranet/workspace/browser/forms.py b/src/ploneintranet/workspace/browser/forms.py
index 00c5dd9..fd87f6f 100644
--- a/src/ploneintranet/workspace/browser/forms.py
+++ b/src/ploneintranet/workspace/browser/forms.py
@@ -130,8 +130,10 @@ def handleApply(self, action):
         move = data.get("move", False)
         removable = []
         for member in ws.members:
-            user_id = api.user.get(username=member).getId()
-            other_ws.add_to_team(user=user_id)
+            user = api.user.get(username=member)
+            if user is not None:
+                user_id = user.getId()
+                other_ws.add_to_team(user=user_id)
             removable.append(member)
 
         if move:
diff --git a/src/ploneintranet/workspace/tests/test_forms.py b/src/ploneintranet/workspace/tests/test_forms.py
index 21eb1b8..3513b0a 100644
--- a/src/ploneintranet/workspace/tests/test_forms.py
+++ b/src/ploneintranet/workspace/tests/test_forms.py
@@ -143,6 +143,49 @@ def create_user(self, name="testuser", password="secret"):
             )
         return user
 
+    def test_non_existing_member_is_not_transferred(self):
+        self.login_as_portal_owner()
+
+        provideAdapter(adapts=(Interface, IBrowserRequest),
+                       provides=Interface,
+                       factory=TransferMembershipForm,
+                       name="transfer")
+        ws = api.content.create(
+            self.portal,
+            "ploneintranet.workspace.workspacefolder",
+            "alejandro-workspace",
+            title="Alejandro workspace")
+
+        names = "Dima Nikita Alex Vlad Sergey".split()
+        for name in names:
+            IWorkspace(ws).add_to_team(
+                user=self.create_user(name=name).getId())
+
+        # subtracting admin from members list
+        self.assertEqual(len(names), len(list(IWorkspace(ws).members))-1)
+
+        other_ws = api.content.create(
+            self.portal,
+            "ploneintranet.workspace.workspacefolder",
+            "isabella-workspace",
+            "Isabella Workspace",)
+
+        api.user.delete(username="Dima")
+        self.assertEqual(len(names), len(list(IWorkspace(ws).members))-1)
+
+        # make a move
+        request = self.make_request(api.content.get_uuid(other_ws), True)
+        form = api.content.get_view('transfer',
+                                    context=ws,
+                                    request=request)
+        form.update()
+        data, errors = form.extractData()
+        self.assertEqual(len(errors), 0)
+
+        self.assertEqual(
+            len(names)-1, len(list(IWorkspace(other_ws).members))-1)
+        self.assertEqual(0, len(list(IWorkspace(ws).members)))
+
     def test_transfer_form(self):
         """ Check that the transfer form can copy/move users
             to another workspace """