diff --git a/models/pos_order.py b/models/pos_order.py
index c8d4134..32d0391 100644
--- a/models/pos_order.py
+++ b/models/pos_order.py
@@ -90,6 +90,27 @@ class PosOrder(models.Model):
                     if abs(pts) > 0.0001:
                         new_card.points += pts
 
+                # Transfer loyalty history (point transactions) to the new card
+                old_histories = self.env['loyalty.history'].sudo().search([
+                    ('card_id', 'in', all_old_cards.ids)
+                ])
+                if old_histories:
+                    old_histories.write({'card_id': new_card.id})
+
+                # Transfer POS order line coupon references to the new card
+                old_pos_lines = self.env['pos.order.line'].sudo().search([
+                    ('coupon_id', 'in', all_old_cards.ids)
+                ])
+                if old_pos_lines:
+                    old_pos_lines.write({'coupon_id': new_card.id})
+
+                # Transfer Sales order line coupon references to the new card
+                old_sale_lines = self.env['sale.order.line'].sudo().search([
+                    ('coupon_id', 'in', all_old_cards.ids)
+                ])
+                if old_sale_lines:
+                    old_sale_lines.write({'coupon_id': new_card.id})
+
                 # Archive old-level cards (active=False) instead of deleting,
                 # because pos_order_line.coupon_id may reference them (FK constraint).
                 # Archiving hides them from the UI while preserving order history.