diff --git a/addons/website_sale/models/account_move.py b/addons/website_sale/models/account_move.py
index 1fb743223cb..0b3d3413e1d 100644
--- a/addons/website_sale/models/account_move.py
+++ b/addons/website_sale/models/account_move.py
@@ -1,12 +1,20 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-from odoo import fields, models, api
+from odoo import fields, models
 
 
 class AccountMove(models.Model):
     _inherit = 'account.move'
 
-    website_id = fields.Many2one('website', related='partner_id.website_id', string='Website',
-                                 help='Website through which this invoice was created for eCommerce orders.',
-                                 store=True, readonly=True, tracking=True)
+    website_id = fields.Many2one(
+        'website', related='partner_id.website_id', string='Website',
+        help='Website through which this invoice was created for eCommerce orders.',
+        store=True, readonly=True, tracking=True)
+
+    def preview_invoice(self):
+        action = super().preview_invoice()
+        if action['url'].startswith('/'):
+            # URL should always be relative, safety check
+            action['url'] = f'/@{action["url"]}'
+        return action
diff --git a/addons/website_sale/models/sale_order.py b/addons/website_sale/models/sale_order.py
index 70601c5d135..b56df2d431d 100644
--- a/addons/website_sale/models/sale_order.py
+++ b/addons/website_sale/models/sale_order.py
@@ -449,9 +449,17 @@ class SaleOrder(models.Model):
         # If a potential customer creates one or more abandoned sale order and then completes a sale order before
         # the recovery email gets sent, then the email won't be sent.
 
-        return self.filtered(lambda abandoned_sale_order:
+        return self.filtered(
+            lambda abandoned_sale_order:
             abandoned_sale_order.partner_id.email
             and not any(transaction.state == 'error' for transaction in abandoned_sale_order.transaction_ids)
             and any(not float_is_zero(line.price_unit, precision_rounding=line.currency_id.rounding) for line in abandoned_sale_order.order_line)
             and not has_later_sale_order.get(abandoned_sale_order.partner_id, False)
         )
+
+    def action_preview_sale_order(self):
+        action = super().action_preview_sale_order()
+        if action['url'].startswith('/'):
+            # URL should always be relative, safety check
+            action['url'] = f'/@{action["url"]}'
+        return action