diff --git a/addons/mail/models/mail_message.py b/addons/mail/models/mail_message.py
index c3b351264d3..aebe92f1457 100644
--- a/addons/mail/models/mail_message.py
+++ b/addons/mail/models/mail_message.py
@@ -580,8 +580,9 @@ class Message(models.Model):
                                 WHERE message.message_type = %%s AND (message.subtype_id IS NULL OR subtype.internal IS TRUE) AND message.id = ANY (%%s)''' % (self._table), ('comment', self.ids,))
             if self._cr.fetchall():
                 raise AccessError(
-                    _('The requested operation cannot be completed due to security restrictions. Please contact your system administrator.\n\n(Document type: %s, Operation: %s)') %
-                    (self._description, operation))
+                    _('The requested operation cannot be completed due to security restrictions. Please contact your system administrator.\n\n(Document type: %s, Operation: %s)') % (self._description, operation)
+                    + ' - ({} {}, {} {})'.format(_('Records:'), self.ids[:6], _('User:'), self._uid)
+                )
 
         # Read mail_message.ids to have their values
         message_values = dict((res_id, {}) for res_id in self.ids)
@@ -680,8 +681,9 @@ class Message(models.Model):
         if not other_ids:
             return
         raise AccessError(
-            _('The requested operation cannot be completed due to security restrictions. Please contact your system administrator.\n\n(Document type: %s, Operation: %s)') %
-            (self._description, operation))
+            _('The requested operation cannot be completed due to security restrictions. Please contact your system administrator.\n\n(Document type: %s, Operation: %s)') % (self._description, operation)
+            + ' - ({} {}, {} {})'.format(_('Records:'), list(other_ids)[:6], _('User:'), self._uid)
+        )
 
     @api.model
     def _get_record_name(self, values):
diff --git a/addons/point_of_sale/static/src/js/screens.js b/addons/point_of_sale/static/src/js/screens.js
index 02069ce2cdd..48db503921b 100644
--- a/addons/point_of_sale/static/src/js/screens.js
+++ b/addons/point_of_sale/static/src/js/screens.js
@@ -2095,6 +2095,10 @@ var set_fiscal_position_button = ActionButtonWidget.extend({
             confirm: function (fiscal_position) {
                 var order = self.pos.get_order();
                 order.fiscal_position = fiscal_position;
+                // Fix the taxes on existing lines
+                _.each(order.get_orderlines(), function (line) {
+                    order.fix_tax_included_price(line);
+                });
                 order.trigger('change');
             }
         });
diff --git a/addons/website_mail/models/mail_message.py b/addons/website_mail/models/mail_message.py
index e60392f62bd..c3d64567e1b 100644
--- a/addons/website_mail/models/mail_message.py
+++ b/addons/website_mail/models/mail_message.py
@@ -54,7 +54,10 @@ class MailMessage(models.Model):
         if self.user_has_groups('base.group_public'):
             self.env.cr.execute('SELECT id FROM "%s" WHERE website_published IS FALSE AND id = ANY (%%s)' % (self._table), (self.ids,))
             if self.env.cr.fetchall():
-                raise AccessError(_('The requested operation cannot be completed due to security restrictions. Please contact your system administrator.\n\n(Document type: %s, Operation: %s)') % (self._description, operation))
+                raise AccessError(
+                    _('The requested operation cannot be completed due to security restrictions. Please contact your system administrator.\n\n(Document type: %s, Operation: %s)') % (self._description, operation)
+                    + ' - ({} {}, {} {})'.format(_('Records:'), self.ids[:6], _('User:'), self._uid)
+                )
         return super(MailMessage, self).check_access_rule(operation=operation)
 
 
diff --git a/odoo/addons/base/ir/ir_actions.py b/odoo/addons/base/ir/ir_actions.py
index d691262e28f..a99f36dc7a9 100644
--- a/odoo/addons/base/ir/ir_actions.py
+++ b/odoo/addons/base/ir/ir_actions.py
@@ -359,7 +359,10 @@ class IrActionsActWindow(models.Model):
         existing = self.filtered(lambda rec: rec.id in ids)
         if len(existing) < len(self):
             # mark missing records in cache with a failed value
-            exc = MissingError(_("Record does not exist or has been deleted."))
+            exc = MissingError(
+                _("Record does not exist or has been deleted.")
+                + '\n\n({} {}, {} {})'.format(_('Records:'), (self - existing).ids[:6], _('User:'), self._uid)
+            )
             (self - existing)._cache.update(fields.FailedValue(exc))
         return existing
 
diff --git a/odoo/addons/base/ir/ir_model.py b/odoo/addons/base/ir/ir_model.py
index e2fd2ee249f..e243ad97f2f 100644
--- a/odoo/addons/base/ir/ir_model.py
+++ b/odoo/addons/base/ir/ir_model.py
@@ -965,6 +965,7 @@ class IrModelAccess(models.Model):
             else:
                 msg_tail = _("Please contact your system administrator if you think this is an error.") + "\n\n(" + _("Document model") + ": %s)"
                 msg_params = (model,)
+            msg_tail += ' - ({} {}, {} {})'.format(_('Operation:'), mode, _('User:'), self._uid)
             _logger.info('Access Denied by ACLs for operation: %s, uid: %s, model: %s', mode, self._uid, model)
             msg = '%s %s' % (msg_heads[mode], msg_tail)
             raise AccessError(msg % msg_params)
diff --git a/odoo/models.py b/odoo/models.py
index ba1d51b2df0..6c896ddc873 100644
--- a/odoo/models.py
+++ b/odoo/models.py
@@ -2993,9 +2993,13 @@ class BaseModel(object):
             if invalid_fields:
                 _logger.info('Access Denied by ACLs for operation: %s, uid: %s, model: %s, fields: %s',
                     operation, self._uid, self._name, ', '.join(invalid_fields))
-                raise AccessError(_('The requested operation cannot be completed due to security restrictions. '
-                                    'Please contact your system administrator.\n\n(Document type: %s, Operation: %s)') % \
-                                  (self._description, operation))
+                raise AccessError(
+                    _(
+                        'The requested operation cannot be completed due to security restrictions. '
+                        'Please contact your system administrator.\n\n(Document type: %s, Operation: %s)'
+                    ) % (self._description, operation)
+                    + ' - ({} {}, {} {})'.format(_('User:'), self._uid, _('Fields:'), ', '.join(invalid_fields))
+                )
 
         return fields
 
@@ -3209,8 +3213,8 @@ class BaseModel(object):
             if forbidden:
                 # store an access error exception in existing records
                 exc = AccessError(
-                    _('The requested operation cannot be completed due to security restrictions. Please contact your system administrator.\n\n(Document type: %s, Operation: %s)') % \
-                    (self._name, 'read')
+                    _('The requested operation cannot be completed due to security restrictions. Please contact your system administrator.\n\n(Document type: %s, Operation: %s)') % (self._description, 'read')
+                    + ' - ({} {}, {} {})'.format(_('Records:'), self.ids[:6], _('User:'), self._uid)
                 )
                 forbidden._cache.update(FailedValue(exc))
 
@@ -3294,8 +3298,10 @@ class BaseModel(object):
                 if self._uid == SUPERUSER_ID:
                     return
                 _logger.info('Access Denied by record rules for operation: %s on record ids: %r, uid: %s, model: %s', operation, forbidden_ids, self._uid, self._name)
-                raise AccessError(_('The requested operation cannot be completed due to security restrictions. Please contact your system administrator.\n\n(Document type: %s, Operation: %s)') % \
-                                    (self._description, operation))
+                raise AccessError(
+                    _('The requested operation cannot be completed due to security restrictions. Please contact your system administrator.\n\n(Document type: %s, Operation: %s)') % (self._description, operation)
+                    + ' - ({} {}, {}, {})'.format(_('Records:'), forbidden_ids[:6], _('User:'), self._uid)
+                )
             else:
                 # If we get here, the missing_ids are not in the database
                 if operation in ('read','unlink'):
@@ -3304,7 +3310,13 @@ class BaseModel(object):
                     # errors for non-transactional search/read sequences coming from clients
                     return
                 _logger.info('Failed operation on deleted record(s): %s, uid: %s, model: %s', operation, self._uid, self._name)
-                raise MissingError(_('Missing document(s)') + ':' + _('One of the documents you are trying to access has been deleted, please try again after refreshing.'))
+                raise MissingError(
+                    _('Missing document(s)') + ':' + _('One of the documents you are trying to access has been deleted, please try again after refreshing.')
+                    + '\n\n({} {}, {} {}, {} {}, {} {})'.format(
+                        _('Document type:'), self._description, _('Operation:'), operation,
+                        _('Records:'), missing_ids[:6], _('User:'), self._uid,
+                    )
+                )
 
     @api.model
     def check_access_rights(self, operation, raise_exception=True):
@@ -3645,7 +3657,10 @@ class BaseModel(object):
             for sub_ids in cr.split_for_in_conditions(set(self.ids)):
                 cr.execute(query, params + (sub_ids,))
                 if cr.rowcount != len(sub_ids):
-                    raise MissingError(_('One of the records you are trying to modify has already been deleted (Document type: %s).') % self._description)
+                    raise MissingError(
+                        _('One of the records you are trying to modify has already been deleted (Document type: %s).') % self._description
+                        + '\n\n({} {}, {} {})'.format(_('Records:'), sub_ids[:6], _('User:'), self._uid)
+                    )
 
             # TODO: optimize
             for name in direct:
@@ -4422,7 +4437,10 @@ class BaseModel(object):
         existing = self.browse(ids + new_ids)
         if len(existing) < len(self):
             # mark missing records in cache with a failed value
-            exc = MissingError(_("Record does not exist or has been deleted."))
+            exc = MissingError(
+                _("Record does not exist or has been deleted.")
+                + '\n\n({} {}, {} {})'.format(_('Records:'), (self - existing).ids[:6], _('User:'), self._uid)
+            )
             (self - existing)._cache.update(FailedValue(exc))
         return existing