diff --git a/preferences/migrations/0064_auto_20191008_1335.py b/preferences/migrations/0064_auto_20191008_1335.py
new file mode 100644
index 00000000..a1bdb9fc
--- /dev/null
+++ b/preferences/migrations/0064_auto_20191008_1335.py
@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.23 on 2019-10-08 11:35
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('preferences', '0063_mandate'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='mailmessageoption',
+            name='welcome_mail_en',
+            field=models.TextField(blank=True, default='', help_text='Welcome email in English'),
+        ),
+        migrations.AlterField(
+            model_name='mailmessageoption',
+            name='welcome_mail_fr',
+            field=models.TextField(blank=True, default='', help_text='Welcome email in French'),
+        ),
+    ]
diff --git a/preferences/migrations/0065_auto_20191010_1227.py b/preferences/migrations/0065_auto_20191010_1227.py
new file mode 100644
index 00000000..175dfd5b
--- /dev/null
+++ b/preferences/migrations/0065_auto_20191010_1227.py
@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.23 on 2019-10-10 10:27
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('preferences', '0064_auto_20191008_1335'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='radiuskey',
+            name='default_switch',
+            field=models.BooleanField(default=False, help_text='Default key for switches'),
+        ),
+    ]
diff --git a/preferences/models.py b/preferences/models.py
index f09e63a7..f3c8fd7b 100644
--- a/preferences/models.py
+++ b/preferences/models.py
@@ -330,8 +330,7 @@ class RadiusKey(AclMixin, models.Model):
         help_text=_("Comment for this key")
     )
     default_switch = models.BooleanField(
-        default=True,
-        unique=True,
+        default=False,
         help_text=_("Default key for switches")
     )
 
@@ -342,6 +341,13 @@ class RadiusKey(AclMixin, models.Model):
         verbose_name = _("RADIUS key")
         verbose_name_plural = _("RADIUS keys")
 
+    def clean(self):
+        """Clean model:
+        Check default switch is unique
+        """
+        if RadiusKey.objects.filter(default_switch=True).count() > 1:
+            raise ValidationError(_("Default radiuskey for switchs already exist"))
+
     def __str__(self):
         return _("RADIUS key ") + str(self.id) + " " + str(self.comment)
 
@@ -616,8 +622,16 @@ def homeoption_post_save(**kwargs):
 class MailMessageOption(AclMixin, models.Model):
     """Reglages, mail de bienvenue et autre"""
 
-    welcome_mail_fr = models.TextField(default="", help_text=_("Welcome email in French"))
-    welcome_mail_en = models.TextField(default="", help_text=_("Welcome email in English"))
+    welcome_mail_fr = models.TextField(
+        default="",
+        blank=True,
+        help_text=_("Welcome email in French")
+    )
+    welcome_mail_en = models.TextField(
+        default="",
+        blank=True,
+        help_text=_("Welcome email in English")
+    )
 
     class Meta:
         permissions = (
diff --git a/tickets/views.py b/tickets/views.py
index b16e4eea..e59c69a0 100644
--- a/tickets/views.py
+++ b/tickets/views.py
@@ -186,7 +186,7 @@ def preferences(request):
 def contact(request):
     """View to display a contact address on the contact page
     used here to display a link to open a ticket"""
-    return ('users', render_to_string('tickets/contact.html'))
+    return render_to_string('tickets/contact.html')
 
 def navbar_user():
     """View to display the ticket link in thet user's dropdown in the navbar"""