diff --git a/addons/account_payment/models/payment_transaction.py b/addons/account_payment/models/payment_transaction.py
index 1018cb61e95..48e7e04a65b 100644
--- a/addons/account_payment/models/payment_transaction.py
+++ b/addons/account_payment/models/payment_transaction.py
@@ -1,6 +1,6 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-from odoo import api, fields, models, _
+from odoo import api, fields, models, SUPERUSER_ID, _
 
 
 class PaymentTransaction(models.Model):
@@ -180,6 +180,7 @@ class PaymentTransaction(models.Model):
         :return: None
         """
         self.ensure_one()
+        self = self.with_user(SUPERUSER_ID)  # Log messages as 'OdooBot'
         if self.source_transaction_id.payment_id:
             self.source_transaction_id.payment_id.message_post(body=message)
             for invoice in self.source_transaction_id.invoice_ids:
diff --git a/addons/sale/models/payment_transaction.py b/addons/sale/models/payment_transaction.py
index ef8f89e0634..78c24dcd0e0 100644
--- a/addons/sale/models/payment_transaction.py
+++ b/addons/sale/models/payment_transaction.py
@@ -98,6 +98,7 @@ class PaymentTransaction(models.Model):
         :return: None
         """
         super()._log_message_on_linked_documents(message)
+        self = self.with_user(SUPERUSER_ID)  # Log messages as 'OdooBot'
         for order in self.sale_order_ids:
             order.message_post(body=message)