diff --git a/client/httpd.py b/client/httpd.py
index bf1f26d..68487d5 100644
--- a/client/httpd.py
+++ b/client/httpd.py
@@ -26,10 +26,19 @@ def start():
 
     return render_template('start.html', result=result, url=url)
 
+
 @app.route('/back')
 def back():
 
     return render_template('back.html', result='ok' in request.args)
 
+
+@app.route('/ipn', methods=['POST'])
+def ipn():
+
+    print api.check_ipn(request.form)
+
+    return ''
+
 if __name__ == "__main__":
     app.run(debug=True)
diff --git a/client/libs/polybanking.py b/client/libs/polybanking.py
index 0a95d66..275bea9 100644
--- a/client/libs/polybanking.py
+++ b/client/libs/polybanking.py
@@ -1,5 +1,6 @@
 import requests
 import hashlib
+import datetime
 
 
 class PolyBanking():
@@ -45,3 +46,21 @@ def new_transation(self, amount, reference, extra_data=''):
             return (result['status'], result['url'])
         except:
             return ('ERROR', '')
+
+    def check_ipn(self, post_data):
+        """Check if IPN data is valid. Return (is_ok, message, reference, status, status_good, last_update)"""
+
+        data = {}
+
+        #check sign
+        for key in post_data:
+            if key != 'sign':
+                data[key] = post_data[key]
+
+        if post_data['sign'] != self.compute_sign(self.keyIPN, data):
+            return (False, 'SIGN', None, None, None, None)
+
+        if post_data['config'] != self.config_id:
+            return (False, 'CONFIG', None, None, None, None)
+
+        return (True, '', data['reference'], data['postfinance_status'], data['postfinance_status_good'] == 'True', datetime.datetime.strptime(data['last_update'][:-6], '%Y-%m-%d %H:%M:%S'))
diff --git a/server/app/settings.py b/server/app/settings.py
index 13d25a1..6fa7c9f 100644
--- a/server/app/settings.py
+++ b/server/app/settings.py
@@ -114,6 +114,7 @@
 
     'south',
     'bootstrap3',
+    'djcelery',
 
     'main',
     'users',
@@ -161,6 +162,14 @@
 TEQUILA_AUTOCREATE = True  # Auto create users ?
 TEQUILA_FAILURE = '/'  # Where to redirect user if there is a problem
 
+import djcelery
+djcelery.setup_loader()
+
+DATE_FORMAT = 'Y/d/m'
+TIME_FORMAT = 'H:i:s'
+
+DATETIME_FORMAT = DATE_FORMAT + ' ' + TIME_FORMAT
+
 try:
     from settingsLocal import *
 except ImportError:
diff --git a/server/app/settingsLocal.py.dist b/server/app/settingsLocal.py.dist
index 47880a5..0079811 100644
--- a/server/app/settingsLocal.py.dist
+++ b/server/app/settingsLocal.py.dist
@@ -30,3 +30,5 @@ PSPID_TEST = ''
 PSPID_PROD = ''
 
 CURRENCY = 'CHF'
+
+BROKER_URL = ''
diff --git a/server/data/pip-reqs.txt b/server/data/pip-reqs.txt
index b3a1e51..697a2df 100644
--- a/server/data/pip-reqs.txt
+++ b/server/data/pip-reqs.txt
@@ -1,2 +1,5 @@
 south
 django-bootstrap3
+requests
+celery
+django-celery
diff --git a/server/paiements/tasks.py b/server/paiements/tasks.py
new file mode 100644
index 0000000..0ed0467
--- /dev/null
+++ b/server/paiements/tasks.py
@@ -0,0 +1,35 @@
+from celery import task
+
+import requests
+from paiements.models import Transaction, TransactionLog
+
+from django.utils.timezone import now
+
+from libs.utils import compute_sign
+
+
+@task(ignore_result=True)
+def send_ipn(transactionPk):
+    """Send IPN about a transaction"""
+
+    transaction = Transaction.objects.get(pk=transactionPk)
+
+    if not transaction.config.active or not transaction.config.admin_enable:
+        return
+
+    data = {'config': str(transaction.config.pk), 'reference': transaction.reference, 'postfinance_status': transaction.postfinance_status, 'postfinance_status_good': str(transaction.postfinance_status_good()), 'last_update': str(transaction.last_postfinance_ipn_date)}
+    data['sign'] = compute_sign(transaction.config.key_ipn, data)
+
+    try:
+        error = requests.post(transaction.config.url_ipn, data=data).status_code != 200
+    except:
+        error = True
+
+    if not error:
+        transaction.last_ipn_date = now()
+        transaction.ipn_needed = False
+        transaction.save(update_fields=['last_ipn_date', 'ipn_needed'])
+
+        TransactionLog(transaction=transaction, log_type='ipnsuccess', extra_data='').save()
+    else:
+        TransactionLog(transaction=transaction, log_type='ipnfailled', extra_data='').save()
diff --git a/server/paiements/templates/paiements/transactions/list.html b/server/paiements/templates/paiements/transactions/list.html
index f1f722e..0490fa1 100644
--- a/server/paiements/templates/paiements/transactions/list.html
+++ b/server/paiements/templates/paiements/transactions/list.html
@@ -44,6 +44,7 @@ <h3 class="panel-title">
                         <th>{% trans "Amount" %}</th>
                         <th>{% trans "Postfinance status" %}</th>
                         <th>{% trans "Internal status" %}</th>
+                        <th>{% trans "IPN Needed ?" %}</th>
                         <th>{% trans "Date" %}</th>
                         <th style="width: 150px;"></th>
                     </tr>
@@ -55,6 +56,7 @@ <h3 class="panel-title">
                             <td>{{elem.amount_chf|floatformat:"2"}} CHF</td>
                             <td><span class="label label-{{elem.postfinance_status_good|yesno:"success,danger"}}">{{elem.get_postfinance_status_display}}</span></td>
                             <td><span class="label label-{{elem.internal_status_good|yesno:"success,danger"}}">{{elem.get_internal_status_display}}</span></td>
+                            <td><span class="label label-{{elem.ipn_needed|yesno:"danger,success"}}">{{elem.ipn_needed|yesno}}</span></td>
                             <td>{{elem.creation_date|date}} {{elem.creation_date|time}} ({{elem.creation_date|timesince}})</td>
                             <td>
                                 <a href="{% url 'paiements.views.transactions_show_logs' elem.pk %}" class="btn btn-xs btn-default"><i class="glyphicon glyphicon-list-alt"></i> {% trans "Logs" %}</a>
diff --git a/server/paiements/templates/paiements/transactions/show.html b/server/paiements/templates/paiements/transactions/show.html
index 7e0629d..1fe6ef5 100644
--- a/server/paiements/templates/paiements/transactions/show.html
+++ b/server/paiements/templates/paiements/transactions/show.html
@@ -62,7 +62,10 @@ <h3 class="panel-title">{% trans "Details of a transaction" %}</h3>
 
               <div class="form-group">
                 <label>{% trans "Ipn needed ?" %}</label>
-                <p class="form-control-static"><span class="label label-{{object.ipn_needed|yesno:"danger,success"}}">{{object.ipn_needed|yesno}}</span></p>
+                <p class="form-control-static">
+                  <span class="label label-{{object.ipn_needed|yesno:"danger,success"}}">{{object.ipn_needed|yesno}}</span>
+                  <a href="{% url 'paiements.views.transactions_send_ipn' object.pk %}" class="btn btn-warning btn-xs">{% trans "Force send" %}</a>
+                </p>
               </div>
 
               <div class="form-group">
diff --git a/server/paiements/urls.py b/server/paiements/urls.py
index e0d610d..3115d33 100644
--- a/server/paiements/urls.py
+++ b/server/paiements/urls.py
@@ -13,5 +13,7 @@
     url(r'^transactions/list$', 'transactions_list'),
     url(r'^transactions/(?P<pk>[0-9]+)/$', 'transactions_show'),
     url(r'^transactions/(?P<pk>[0-9]+)/logs$', 'transactions_show_logs'),
+    url(r'^transactions/(?P<pk>[0-9]+)/ipn$', 'transactions_send_ipn'),
+   
 
 )
diff --git a/server/paiements/views.py b/server/paiements/views.py
index 08188b6..8a6d73a 100644
--- a/server/paiements/views.py
+++ b/server/paiements/views.py
@@ -23,6 +23,7 @@
 
 from configs.models import Config
 from paiements.models import Transaction, TransactionLog
+from paiements.tasks import send_ipn
 from libs import utils
 
 from django.utils.timezone import now
@@ -107,7 +108,7 @@ def go(request, pk):
 
     t.internal_status = 'fw'
     t.last_userforwarded_date = now()
-    t.save()
+    t.save(update_fields=['internal_status', 'last_userforwarded_date'])
 
     return render_to_response('paiements/go.html', {'fields': fields, 'urlDest': urlDest}, context_instance=RequestContext(request))
 
@@ -116,8 +117,6 @@ def go(request, pk):
 def ipn(request):
     """Call by Postfinance website about status"""
 
-    print request.POST
-
     # Get transaction pk
     orderId = request.POST.get('orderID')
 
@@ -154,10 +153,13 @@ def ipn(request):
     t.internal_status = 'fb'
     t.last_postfinance_ipn_date = now()
     t.postfinance_status = request.POST.get('STATUS')
-    t.save()
+    t.ipn_needed = True
+    t.save(update_fields=['internal_status', 'last_postfinance_ipn_date', 'postfinance_status', 'ipn_needed', 'postfinance_id'])
 
     TransactionLog(transaction=t, log_type='postfinanceStatus', extra_data=request.POST.get('STATUS')).save()
 
+    send_ipn.delay(t.pk)
+
     return HttpResponse('')
 
 
@@ -198,7 +200,7 @@ def return_from_postfinance(request):
 
     t.internal_status = 'fb'
     t.last_user_back_from_postfinance_date = now()
-    t.save()
+    t.save(update_fields=['internal_status', 'last_user_back_from_postfinance_date', 'postfinance_id'])
 
     TransactionLog(transaction=t, log_type='userBackFromPostfinance', extra_data=request.META['REMOTE_ADDR']).save()
 
@@ -268,3 +270,18 @@ def transactions_show(request, pk):
         raise Http404
 
     return render_to_response('paiements/transactions/show.html', {'object': object}, context_instance=RequestContext(request))
+
+
+@login_required
+def transactions_send_ipn(request, pk):
+
+    object = get_object_or_404(Transaction, pk=pk)
+
+    if not request.user.is_superuser and not request.user in object.allowed_users:
+        raise Http404
+
+    send_ipn.delay(object.pk)
+
+    messages.success(request, _('IPN has been queued !'))
+
+    return redirect('paiements.views.transactions_show', object.pk)