diff --git a/apps/participation/templates/participation/team_detail.html b/apps/participation/templates/participation/team_detail.html
index a4570e4..04ccb6a 100644
--- a/apps/participation/templates/participation/team_detail.html
+++ b/apps/participation/templates/participation/team_detail.html
@@ -81,7 +81,7 @@
                 </div>
             {% else %}
                 <div class="alert alert-warning">
-                    {% trans "Your team must be composed of 3 members and each member must upload its photo authorization." %}
+                    {% trans "Your team must be composed of 3 members and each member must upload its photo authorization and confirm its email address." %}
                 </div>
             {% endif %}
         {% else %}
diff --git a/apps/participation/views.py b/apps/participation/views.py
index 6e8b9d0..b0f5336 100644
--- a/apps/participation/views.py
+++ b/apps/participation/views.py
@@ -101,6 +101,7 @@ class TeamDetailView(LoginRequiredMixin, DetailView):
 
         team = self.object
         context["can_validate"] = team.students.count() >= 3 and \
+            all(r.email_confirmed for r in team.students.all()) and \
             all(r.photo_authorization for r in team.students.all()) and \
             team.participation.problem
 
diff --git a/locale/fr/LC_MESSAGES/django.po b/locale/fr/LC_MESSAGES/django.po
index 6876998..9f785fa 100644
--- a/locale/fr/LC_MESSAGES/django.po
+++ b/locale/fr/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Corres2math\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2020-10-11 16:27+0200\n"
+"POT-Creation-Date: 2020-10-11 16:48+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: Yohann D'ANELLO <yohann.danello@animath.fr>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -329,10 +329,10 @@ msgstr "Soumettre mon équipe à validation"
 #: apps/participation/templates/participation/team_detail.html:84
 msgid ""
 "Your team must be composed of 3 members and each member must upload its "
-"photo authorization."
+"photo authorization and confirm its email address."
 msgstr ""
 "Votre équipe doit être composée de 3 membres et chaque membre doit envoyer "
-"son autorisation de droit à l'image."
+"son autorisation de droit à l'image et confirmé son adresse e-mail."
 
 #: apps/participation/templates/participation/team_detail.html:89
 msgid "This team didn't ask for validation yet."
@@ -364,25 +364,25 @@ msgstr "Vous êtes déjà dans une équipe."
 msgid "Join team"
 msgstr "Rejoindre une équipe"
 
-#: apps/participation/views.py:86 apps/participation/views.py:172
+#: apps/participation/views.py:86 apps/participation/views.py:175
 msgid "You are not in a team."
 msgstr "Vous n'êtes pas dans une équipe."
 
-#: apps/participation/views.py:87 apps/participation/views.py:173
+#: apps/participation/views.py:87 apps/participation/views.py:176
 msgid "You don't participate, so you don't have any team."
 msgstr "Vous ne participez pas, vous n'avez donc pas d'équipe."
 
-#: apps/participation/views.py:156 apps/registration/views.py:213
+#: apps/participation/views.py:159 apps/registration/views.py:213
 #, python-brace-format
 msgid "Photo authorization of {student}.{ext}"
 msgstr "Autorisation de droit à l'image de {student}.{ext}"
 
-#: apps/participation/views.py:160
+#: apps/participation/views.py:163
 #, python-brace-format
 msgid "Photo authorizations of team {trigram}.zip"
 msgstr "Autorisations de droit à l'image de l'équipe {trigram}.zip"
 
-#: apps/participation/views.py:182
+#: apps/participation/views.py:185
 msgid "The team is not validated yet."
 msgstr "L'équipe n'est pas encore validée."
 
@@ -515,14 +515,6 @@ msgstr ""
 "Un email a été envoyé. Merci de cliquer sur le lien pour activer votre "
 "compte."
 
-#: apps/registration/templates/registration/logged_out.html:8
-msgid "Thanks for spending some quality time with the Web site today."
-msgstr "Merci d'avoir utilisé la plateforme des Correspondances."
-
-#: apps/registration/templates/registration/logged_out.html:9
-msgid "Log in again"
-msgstr "Se reconnecter"
-
 #: apps/registration/templates/registration/mails/email_validation_email.html:12
 #: apps/registration/templates/registration/mails/email_validation_email.txt:3
 msgid "Hi"
@@ -846,6 +838,14 @@ msgstr ""
 msgid "Contact us"
 msgstr "Nous contacter"
 
+#: templates/registration/logged_out.html:8
+msgid "Thanks for spending some quality time with the Web site today."
+msgstr "Merci d'avoir utilisé la plateforme des Correspondances."
+
+#: templates/registration/logged_out.html:9
+msgid "Log in again"
+msgstr "Se reconnecter"
+
 #: templates/registration/login.html:13
 #, python-format
 msgid ""