diff --git a/addons/event/models/event_registration.py b/addons/event/models/event_registration.py
index 361ac3ad416..c7b7886527d 100644
--- a/addons/event/models/event_registration.py
+++ b/addons/event/models/event_registration.py
@@ -106,13 +106,13 @@ class EventRegistration(models.Model):
     # CRUD
     # ------------------------------------------------------------
 
-    @api.model
-    def create(self, vals):
-        registration = super(EventRegistration, self).create(vals)
-        if registration._check_auto_confirmation():
-            registration.sudo().action_confirm()
+    @api.model_create_multi
+    def create(self, vals_list):
+        registrations = super(EventRegistration, self).create(vals_list)
+        if registrations._check_auto_confirmation():
+            registrations.sudo().action_confirm()
 
-        return registration
+        return registrations
 
     def write(self, vals):
         ret = super(EventRegistration, self).write(vals)
diff --git a/addons/event_sale/models/event_registration.py b/addons/event_sale/models/event_registration.py
index f1dc4a315b0..e057739be10 100644
--- a/addons/event_sale/models/event_registration.py
+++ b/addons/event_sale/models/event_registration.py
@@ -22,20 +22,22 @@ class EventRegistration(models.Model):
         action['res_id'] = self.sale_order_id.id
         return action
 
-    @api.model
-    def create(self, vals):
-        if vals.get('sale_order_line_id'):
-            so_line_vals = self._synchronize_so_line_values(
-                self.env['sale.order.line'].browse(vals['sale_order_line_id'])
-            )
-            vals.update(so_line_vals)
-        res = super(EventRegistration, self).create(vals)
-        if res.sale_order_id:
-            res.message_post_with_view(
-                'mail.message_origin_link',
-                values={'self': res, 'origin': res.sale_order_id},
-                subtype_id=self.env.ref('mail.mt_note').id)
-        return res
+    @api.model_create_multi
+    def create(self, vals_list):
+        for vals in vals_list:
+            if vals.get('sale_order_line_id'):
+                so_line_vals = self._synchronize_so_line_values(
+                    self.env['sale.order.line'].browse(vals['sale_order_line_id'])
+                )
+                vals.update(so_line_vals)
+        registrations = super(EventRegistration, self).create(vals)
+        for registration in registrations:
+            if registration.sale_order_id:
+                registration.message_post_with_view(
+                    'mail.message_origin_link',
+                    values={'self': registration, 'origin': registration.sale_order_id},
+                    subtype_id=self.env.ref('mail.mt_note').id)
+        return registrations
 
     def write(self, vals):
         if vals.get('sale_order_line_id'):
diff --git a/addons/website_event_track/models/event_track.py b/addons/website_event_track/models/event_track.py
index 80b16d75e16..6a75af9b40a 100644
--- a/addons/website_event_track/models/event_track.py
+++ b/addons/website_event_track/models/event_track.py
@@ -105,18 +105,19 @@ class Track(models.Model):
             else:
                 track.date_end = False
 
-    @api.model
-    def create(self, vals):
-        track = super(Track, self).create(vals)
+    @api.model_create_multi
+    def create(self, vals_list):
+        tracks = super(Track, self).create(vals_list)
 
-        track.event_id.message_post_with_view(
-            'website_event_track.event_track_template_new',
-            values={'track': track},
-            subject=track.name,
-            subtype_id=self.env.ref('website_event_track.mt_event_track').id,
-        )
+        for track in tracks:
+            track.event_id.message_post_with_view(
+                'website_event_track.event_track_template_new',
+                values={'track': track},
+                subject=track.name,
+                subtype_id=self.env.ref('website_event_track.mt_event_track').id,
+            )
 
-        return track
+        return tracks
 
     def write(self, vals):
         if 'stage_id' in vals and 'kanban_state' not in vals: