diff --git a/golem_resource_account/models/golem_resource_reservation.py b/golem_resource_account/models/golem_resource_reservation.py
index ca8baa5..bb6cef7 100644
--- a/golem_resource_account/models/golem_resource_reservation.py
+++ b/golem_resource_account/models/golem_resource_reservation.py
@@ -27,6 +27,9 @@ class GolemResourceReservation(models.Model):
     """ GOLEM Resource Reservation Adaptation """
     _inherit = 'golem.resource.reservation'
 
+    invoice_id = fields.Many2one('account.invoice')
+    invoice_state = fields.Selection(related="invoice_id.state")
+
 
     @api.multi
     def create_invoice(self):
@@ -47,7 +50,7 @@ class GolemResourceReservation(models.Model):
                     _('There is no income account defined for this product: "%s". \
                        You may have to install a chart of account from Accounting \
                        app, settings menu.') % (product.name,))
-            
+
 
             invoice = inv_obj.create({
                 'name': reservation.name,
diff --git a/golem_resource_account/views/golem_resource_reservation_views.xml b/golem_resource_account/views/golem_resource_reservation_views.xml
index 809edbf..a1add3a 100644
--- a/golem_resource_account/views/golem_resource_reservation_views.xml
+++ b/golem_resource_account/views/golem_resource_reservation_views.xml
@@ -22,8 +22,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 
     <!-- Trees -->
-    <!--<record model="ir.ui.view" id="golem_resource_reservation_view_tree">
-      <field name="name">GOLEM Resource Reservation Tree</field>
+    <record model="ir.ui.view" id="golem_resource_reservation_tree_inherit_golem_resource_account">
+      <field name="name">GOLEM Resource Reservation Tree Adaptation to invoicing</field>
       <field name="model">golem.resource.reservation</field>
       <field name="arch" type="xml">
         <tree>