diff --git a/golem_activity_session_registration/models/golem_activity_session_registration.py b/golem_activity_session_registration/models/golem_activity_session_registration.py
index ff931f5..5c3ff50 100644
--- a/golem_activity_session_registration/models/golem_activity_session_registration.py
+++ b/golem_activity_session_registration/models/golem_activity_session_registration.py
@@ -67,11 +67,6 @@ class GolemActivitySessionRegistration(models.Model):
                                 ondelete='cascade')
     session_id = fields.Many2one('golem.activity.session', required=True,
                                  string='Activity session', ondelete='cascade')
-    invoice_id = fields.Many2one('account.invoice', string='Invoice',
-                                 ondelete='set null')
-    invoice_line_id = fields.Many2one('account.invoice.line',
-                                      string='Invoice line',
-                                      ondelete='set null')
     season_id = fields.Many2one(string='Season',
                                 related='session_id.season_id')
     is_current = fields.Boolean('Current season?',
diff --git a/golem_activity_session_registration/views/golem_activity_session_registration_view.xml b/golem_activity_session_registration/views/golem_activity_session_registration_view.xml
index 0c7f581..b552519 100644
--- a/golem_activity_session_registration/views/golem_activity_session_registration_view.xml
+++ b/golem_activity_session_registration/views/golem_activity_session_registration_view.xml
@@ -44,22 +44,19 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
           <field name="season_id" readonly="1" />
           <field name="member_id" domain="[('is_current', '=', True)]" />
           <field name="session_id" domain="[('is_current', '=', True)]" />
-          <field name="invoice_id" readonly="1" />
-          <field name="invoice_line_id" readonly="1" />
         </tree>
       </field>
     </record>
 
     <!-- Search -->
     <record id="searches" model="ir.ui.view">
-      <field name="name">GOLEM Activity Sesion Registration searches</field>
+      <field name="name">GOLEM Activity Session Registration searches</field>
       <field name="model">golem.activity.session.registration</field>
       <field name="arch" type="xml">
         <search>
           <field name="season_id" widget="many2one" />
           <field name="member_id" widget="many2one" />
           <field name="session_id" widget="many2one" />
-          <field name="invoice_id" widget="many2one" />
           <filter name="season_default" string="Default season"
            domain="[('is_current', '=', True)]" />
         </search>
diff --git a/golem_activity_session_registration/views/golem_activity_view.xml b/golem_activity_session_registration/views/golem_activity_view.xml
index b82e68b..4b1e785 100644
--- a/golem_activity_session_registration/views/golem_activity_view.xml
+++ b/golem_activity_session_registration/views/golem_activity_view.xml
@@ -38,7 +38,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
                     domain="[('season_ids', '=', season_id)]" />
                   <field name="session_id" readonly="1" />
                   <field name="season_id" readonly="1" />
-                  <field name="invoice_id" readonly="1" />
                 </tree>
               </field>
             </group>
diff --git a/golem_activity_session_registration/views/golem_member_view.xml b/golem_activity_session_registration/views/golem_member_view.xml
index 7bc21a7..fc0cadd 100644
--- a/golem_activity_session_registration/views/golem_member_view.xml
+++ b/golem_activity_session_registration/views/golem_member_view.xml
@@ -37,7 +37,6 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
                     domain="[('is_current', '=', True)]" />
                   <field name="season_id" readonly="1" />
                   <field name="member_id" readonly="1" />
-                  <field name="invoice_id" readonly="1" />
                 </tree>
               </field>
             </group>