diff --git a/requirements.txt b/requirements.txt
index b8c5a25b0..5a14473b8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,6 +3,7 @@ django-oauth-toolkit==1.0.0
 django-cors-middleware==1.5.0
 social-auth-core==2.0.0
 social-auth-app-django==3.1.0
+six==1.16.0
 django-extensions==2.2.6
 channels==2.4
 channels_redis==3.2.0
diff --git a/src/apps/profiles/tokens.py b/src/apps/profiles/tokens.py
new file mode 100644
index 000000000..13439a6b0
--- /dev/null
+++ b/src/apps/profiles/tokens.py
@@ -0,0 +1,10 @@
+from django.contrib.auth.tokens import PasswordResetTokenGenerator
+import six
+
+
+class AccountActivationTokenGenerator(PasswordResetTokenGenerator):
+    def _make_hash_value(self, user, timestamp):
+        return (six.text_type(user.pk) + six.text_type(timestamp) + six.text_type(user.is_active))
+
+
+account_activation_token = AccountActivationTokenGenerator()
diff --git a/src/apps/profiles/urls.py b/src/apps/profiles/urls.py
index 085917008..f989ad405 100644
--- a/src/apps/profiles/urls.py
+++ b/src/apps/profiles/urls.py
@@ -6,6 +6,7 @@
 
 urlpatterns = [
     # url(r'^signup', views.sign_up, name="signup"),
+    path('activate/<uidb64>/<token>', views.activate, name='activate'),
     path('user/<slug:username>/edit/', views.UserEditView.as_view(), name='user_edit'),
     path('user/<slug:username>/notifications/', views.UserNotificationEdit.as_view(), name="user_notifications"),
     path('user/<slug:username>/', views.UserDetailView.as_view(), name="user_profile"),
diff --git a/src/apps/profiles/urls_accounts.py b/src/apps/profiles/urls_accounts.py
index 7b956f9f7..6266d5216 100644
--- a/src/apps/profiles/urls_accounts.py
+++ b/src/apps/profiles/urls_accounts.py
@@ -5,7 +5,6 @@
 
 app_name = "accounts"
 
-
 urlpatterns = [
     url(r'^signup', views.sign_up, name="signup"),
     # url(r'^user_profile', views.user_profile, name="user_profile"),
diff --git a/src/apps/profiles/views.py b/src/apps/profiles/views.py
index 581112b4f..93687968f 100644
--- a/src/apps/profiles/views.py
+++ b/src/apps/profiles/views.py
@@ -1,17 +1,24 @@
 import json
 
 from django.conf import settings
-from django.contrib.auth import authenticate, login
+from django.contrib import messages
+from django.contrib.auth import authenticate
+from django.contrib.sites.shortcuts import get_current_site
+from django.core.mail import EmailMessage
 from django.http import Http404
 from django.shortcuts import render, redirect
 from django.contrib.auth import views as auth_views
 from django.contrib.auth.mixins import LoginRequiredMixin
+from django.template.loader import render_to_string
+from django.utils.http import urlsafe_base64_encode, urlsafe_base64_decode
+from django.utils.encoding import force_bytes, force_str
 from django.views.generic import DetailView, TemplateView
 
 from api.serializers.profiles import UserSerializer, OrganizationDetailSerializer, OrganizationEditSerializer, \
     UserNotificationSerializer
 from .forms import SignUpForm
 from .models import User, Organization, Membership
+from .tokens import account_activation_token
 
 
 class LoginView(auth_views.LoginView):
@@ -57,6 +64,44 @@ def get_context_data(self, **kwargs):
         return context
 
 
+def activate(request, uidb64, token):
+    try:
+        # import pdb; pdb.set_trace();
+        uid = force_str(urlsafe_base64_decode(uidb64))
+        user = User.objects.get(pk=uid)
+    except User.DoesNotExist:
+        user = None
+        messages.error(request, f"User not found. Please sign up again.")
+        return redirect('accounts:signup')
+    if user is not None and account_activation_token.check_token(user, token):
+        user.is_active = True
+        user.save()
+        messages.success(request, f'Your account is fully setup! Please login.')
+        return redirect('accounts:login')
+    else:
+        user.delete()
+        messages.error(request, f"Activation link is invalid. Please sign up again.")
+        return redirect('accounts:signup')
+    return redirect('pages:home')
+
+
+def activateEmail(request, user, to_email):
+    mail_subject = 'Activate your user account.'
+    message = render_to_string('profiles/emails/template_activate_account.html', {
+        'user': user.username,
+        'domain': get_current_site(request).domain,
+        'uid': urlsafe_base64_encode(force_bytes(user.pk)),
+        'token': account_activation_token.make_token(user),
+        'protocol': 'https' if request.is_secure() else 'http'
+    })
+    email = EmailMessage(mail_subject, message, to=[to_email])
+    if email.send():
+        messages.success(request, f'Dear {user.username}, please go to you email {to_email} inbox and click on \
+            received activation link to confirm and complete the registration. *Note: Check your spam folder.')
+    else:
+        messages.error(request, f'Problem sending confirmation email to {to_email}, check if you typed it correctly.')
+
+
 def sign_up(request):
     context = {}
     context['chahub_signup_url'] = "{}/profiles/signup?next={}/social/login/chahub".format(
@@ -70,7 +115,9 @@ def sign_up(request):
             username = form.cleaned_data.get('username')
             raw_password = form.cleaned_data.get('password1')
             user = authenticate(username=username, password=raw_password)
-            login(request, user, backend='django.contrib.auth.backends.ModelBackend')
+            user.is_active = False
+            user.save()
+            activateEmail(request, user, form.cleaned_data.get('email'))
             return redirect('pages:home')
         else:
             context['form'] = form
diff --git a/src/templates/base.html b/src/templates/base.html
index fc7221889..850123411 100644
--- a/src/templates/base.html
+++ b/src/templates/base.html
@@ -25,6 +25,37 @@
     {% endblock %}
 </head>
 <body>
+
+{% if messages %}
+    {% for message in messages %}
+        {% if message.tags == 'success'%}
+        <script type=text/javascript>
+            window.addEventListener('load', function () {
+                toastr.{{ message.tags }}('{{ message }}')
+                })
+        </script>
+        {% elif message.tags == 'info' %}
+        <script type=text/javascript>
+            window.addEventListener('load', function () {
+                toastr.{{ message.tags }}('{{ message }}')
+                })
+        </script>
+        {% elif message.tags == 'warning' %}
+        <script type=text/javascript>
+            window.addEventListener('load', function () {
+                toastr.{{ message.tags }}('{{ message }}')
+                })
+        </script>
+        {% elif message.tags == 'error' %}
+        <script type=text/javascript>
+            window.addEventListener('load', function () {
+                toastr.{{ message.tags }}('{{ message }}')
+                })
+        </script>
+        {% endif %}
+    {% endfor %}
+{% endif %}
+
 <!-- Sidebar Menu -->
 <div class="ui thin sidebar left inverted vertical overlay menu">
     <div class="ui container">
@@ -33,6 +64,7 @@
         <a href="https://chagrade.lri.fr/" class="item">Chagrade</a>
     </div>
 </div>
+
 <div class="pusher">
     <div id="hamburger_button">
         <div class="ui icon button">
diff --git a/src/templates/profiles/emails/template_activate_account.html b/src/templates/profiles/emails/template_activate_account.html
new file mode 100644
index 000000000..98ee27122
--- /dev/null
+++ b/src/templates/profiles/emails/template_activate_account.html
@@ -0,0 +1,10 @@
+{% autoescape off %}
+Hi {{ user.username }},
+
+Please click on the link below to confirm your registration:
+
+{{ protocol }}://{{ domain }}{% url 'profiles:activate' uidb64=uid token=token %}
+
+This is an automatic message delivered by Codabench.
+
+{% endautoescape %}