diff --git a/addons/sale_stock/tests/test_sale_stock.py b/addons/sale_stock/tests/test_sale_stock.py
index 2857f3caf6f..2b6679a2868 100644
--- a/addons/sale_stock/tests/test_sale_stock.py
+++ b/addons/sale_stock/tests/test_sale_stock.py
@@ -279,6 +279,10 @@ class TestSaleStock(TestSaleCommon, ValuationReconciliationTestCommon):
         wizard = Form(self.env[(res_dict.get('res_model'))].with_context(res_dict['context'])).save()
         wizard.process_cancel_backorder()
 
+        #Check Exception error is logged on SO
+        activity = self.env['mail.activity'].search([('res_id', '=', self.so.id), ('res_model', '=', 'sale.order')])
+        self.assertEqual(len(activity), 1, 'When no backorder is created for a partial delivery, a warning error should be logged in its origin SO')
+
         # Check quantity delivered
         del_qty = sum(sol.qty_delivered for sol in self.so.order_line)
         self.assertEqual(del_qty, 4.0, 'Sale Stock: delivered quantity should be 4.0 after partial delivery')
@@ -1408,3 +1412,30 @@ class TestSaleStock(TestSaleCommon, ValuationReconciliationTestCommon):
         ])
         self.assertEqual(ship01.move_ids.move_orig_ids, (pick01 | pick02).move_ids)
         self.assertEqual(ship02.move_ids.move_orig_ids, (pick01 | pick02).move_ids)
+
+    def test_exception_delivery_partial_multi(self):
+        """
+        When a backorder is cancelled for a picking in multi-picking,
+        the related SO should have an exception logged
+        """
+        #Create 2 sale orders
+        so_1 = self._get_new_sale_order()
+        so_1.action_confirm()
+        picking_1 = so_1.picking_ids
+        picking_1.move_ids.write({'quantity_done': 1})
+
+        so_2 = self._get_new_sale_order()
+        so_2.action_confirm()
+        picking_2 = so_2.picking_ids
+        picking_2.move_ids.write({'quantity_done': 2})
+
+        #multi-picking validation
+        pick = picking_1 | picking_2
+        res_dict = pick.button_validate()
+        wizard = Form(self.env[(res_dict.get('res_model'))].with_context(res_dict['context'])).save()
+        wizard.backorder_confirmation_line_ids[1].write({'to_backorder': False})
+        wizard.process()
+
+        #Check Exception error is logged on so_2
+        activity = self.env['mail.activity'].search([('res_id', '=', so_2.id), ('res_model', '=', 'sale.order')])
+        self.assertEqual(len(activity), 1, 'When no backorder is created for a partial delivery, a warning error should be logged in its origin SO')
diff --git a/addons/stock/wizard/stock_backorder_confirmation.py b/addons/stock/wizard/stock_backorder_confirmation.py
index 0fc5491e41f..755ac27256b 100644
--- a/addons/stock/wizard/stock_backorder_confirmation.py
+++ b/addons/stock/wizard/stock_backorder_confirmation.py
@@ -37,6 +37,16 @@ class StockBackorderConfirmation(models.TransientModel):
             # because of webclient limitations
         return res
 
+    def _check_less_quantities_than_expected(self, pickings):
+        for pick_id in pickings:
+            moves_to_log = {}
+            for move in pick_id.move_ids:
+                if float_compare(move.product_uom_qty,
+                                 move.quantity_done,
+                                 precision_rounding=move.product_uom.rounding) > 0:
+                    moves_to_log[move] = (move.quantity_done, move.product_uom_qty)
+            pick_id._log_less_quantities_than_expected(moves_to_log)
+
     def process(self):
         pickings_to_do = self.env['stock.picking']
         pickings_not_to_do = self.env['stock.picking']
@@ -46,28 +56,21 @@ class StockBackorderConfirmation(models.TransientModel):
             else:
                 pickings_not_to_do |= line.picking_id
 
-        for pick_id in pickings_not_to_do:
-            moves_to_log = {}
-            for move in pick_id.move_ids:
-                if float_compare(move.product_uom_qty,
-                                 move.quantity_done,
-                                 precision_rounding=move.product_uom.rounding) > 0:
-                    moves_to_log[move] = (move.quantity_done, move.product_uom_qty)
-            pick_id._log_less_quantities_than_expected(moves_to_log)
-
         pickings_to_validate = self.env.context.get('button_validate_picking_ids')
         if pickings_to_validate:
             pickings_to_validate = self.env['stock.picking'].browse(pickings_to_validate).with_context(skip_backorder=True)
             if pickings_not_to_do:
+                self._check_less_quantities_than_expected(pickings_not_to_do)
                 pickings_to_validate = pickings_to_validate.with_context(picking_ids_not_to_backorder=pickings_not_to_do.ids)
             return pickings_to_validate.button_validate()
         return True
 
     def process_cancel_backorder(self):
-        pickings_to_validate = self.env.context.get('button_validate_picking_ids')
-        if pickings_to_validate:
-            return self.env['stock.picking']\
-                .browse(pickings_to_validate)\
-                .with_context(skip_backorder=True, picking_ids_not_to_backorder=pickings_to_validate)\
+        pickings_to_validate_ids = self.env.context.get('button_validate_picking_ids')
+        if pickings_to_validate_ids:
+            pickings_to_validate = self.env['stock.picking'].browse(pickings_to_validate_ids)
+            self._check_less_quantities_than_expected(pickings_to_validate)
+            return pickings_to_validate\
+                .with_context(skip_backorder=True, picking_ids_not_to_backorder=self.pick_ids.ids)\
                 .button_validate()
         return True