diff --git a/budget/models.py b/budget/models.py
index 586f43b..db57869 100644
--- a/budget/models.py
+++ b/budget/models.py
@@ -70,7 +70,10 @@ class Project(db.Model):
         This method returns the status DELETED or DEACTIVATED regarding the
         changes made.
         """
-        person = Person.query.get(member_id, self)
+        try:
+            person = Person.query.get(member_id, self)
+        except orm.exc.NoResultFound:
+            return None
         if not person.has_bills():
             db.session.delete(person)
             db.session.commit()
diff --git a/budget/tests.py b/budget/tests.py
index d127b06..14e605a 100644
--- a/budget/tests.py
+++ b/budget/tests.py
@@ -272,6 +272,13 @@ class BudgetTestCase(TestCase):
         response = self.app.get("/raclette/members/1/delete")
         self.assertEqual(response.status_code, 405)
 
+        #delete user using POST method
+        self.app.post("/raclette/members/1/delete")
+        self.assertEqual(
+                len(models.Project.query.get("raclette").active_members), 0)
+        #try to delete an user already deleted
+        self.app.post("/raclette/members/1/delete")
+
     def test_demo(self):
         # test that a demo project is created if none is defined
         self.assertEqual([], models.Project.query.all())
diff --git a/budget/web.py b/budget/web.py
index defa17e..5afd9b4 100644
--- a/budget/web.py
+++ b/budget/web.py
@@ -307,11 +307,11 @@ def reactivate(member_id):
 @main.route("/<project_id>/members/<member_id>/delete", methods=["POST"])
 def remove_member(member_id):
     member = g.project.remove_member(member_id)
-    if member.activated == False:
-        flash(_("User '%(name)s' has been deactivated", name=member.name))
-    else:
-        flash(_("User '%(name)s' has been removed", name=member.name))
-
+    if member:
+        if member.activated == False:
+            flash(_("User '%(name)s' has been deactivated", name=member.name))
+        else:
+            flash(_("User '%(name)s' has been removed", name=member.name))
     return redirect(url_for(".list_bills"))