diff --git a/samples/Parbad.Sample.AspNetCore/Controllers/PaymentController.cs b/samples/Parbad.Sample.AspNetCore/Controllers/PaymentController.cs
index 8eb5e4d4..810064ec 100644
--- a/samples/Parbad.Sample.AspNetCore/Controllers/PaymentController.cs
+++ b/samples/Parbad.Sample.AspNetCore/Controllers/PaymentController.cs
@@ -42,14 +42,13 @@ public async Task<IActionResult> Pay(PayViewModel viewModel)
                 }
             });
 
+            // Save the result.TrackingNumber in your database.
+
             if (result.IsSucceed)
             {
                 return result.GatewayTransporter.TransportToGateway();
             }
 
-            // Note: This is just for development and testing.
-            // Don't show the actual result object to clients in production environment.
-            // Instead, show only the important information such as IsSucceed, Tracking Number and Transaction Code.
             return View("PayRequestError", result);
         }
 
@@ -67,7 +66,7 @@ public async Task<IActionResult> Verify()
                 return Content("The payment is already processed before.");
             }
 
-            // An example of checking the invoice in your website.
+            // This is an example of cancelling an invoice when you think that the payment process must be stopped.
             if (!Is_There_Still_Product_In_Shop(invoice.TrackingNumber))
             {
                 var cancelResult = await _onlinePayment.CancelAsync(invoice, cancellationReason: "Sorry, We have no more products to sell.");
diff --git a/samples/Parbad.Sample.Mvc/Controllers/PaymentController.cs b/samples/Parbad.Sample.Mvc/Controllers/PaymentController.cs
index b170e9c8..984c34bb 100644
--- a/samples/Parbad.Sample.Mvc/Controllers/PaymentController.cs
+++ b/samples/Parbad.Sample.Mvc/Controllers/PaymentController.cs
@@ -47,14 +47,13 @@ public async Task<ActionResult> Pay(RequestViewModel viewModel)
                 }
             });
 
+            // Save the result.TrackingNumber in your database.
+
             if (result.IsSucceed)
             {
                 return result.GatewayTransporter.TransportToGateway();
             }
 
-            // Note: This is just for development and testing.
-            // Don't show the actual result object to clients in production environment.
-            // Instead, show only the important information such as IsSucceed, Tracking Number and Transaction Code.
             return View("PayRequestError", result);
         }
 
@@ -72,7 +71,7 @@ public async Task<ActionResult> Verify()
                 return Content("The payment is already processed before.");
             }
 
-            // An example of checking the invoice in your website.
+            // This is an example of cancelling an invoice when you think that the payment process must be stopped.
             if (!Is_There_Still_Product_In_Shop(invoice.TrackingNumber))
             {
                 var cancelResult = await _onlinePayment.CancelAsync(invoice, cancellationReason: "Sorry, We have no more products to sell.");
diff --git a/samples/Parbad.Sample.WebForm/PayRequest.aspx.cs b/samples/Parbad.Sample.WebForm/PayRequest.aspx.cs
index ba5df626..c4554301 100644
--- a/samples/Parbad.Sample.WebForm/PayRequest.aspx.cs
+++ b/samples/Parbad.Sample.WebForm/PayRequest.aspx.cs
@@ -38,6 +38,8 @@ protected async void BtnPay_Click(object sender, EventArgs e)
                 }
             });
 
+            // Save the result.TrackingNumber in your database.
+
             if (result.IsSucceed)
             {
                 await result.GatewayTransporter.TransportAsync();
@@ -46,9 +48,6 @@ protected async void BtnPay_Click(object sender, EventArgs e)
             {
                 ResultPanel.Visible = true;
 
-                // Note: This is just for development and testing.
-                // Don't show the actual result object to clients in production environment.
-                // Instead, show only the important information such as IsSucceed, Tracking Number and Transaction Code.
                 LblTrackingNumber.Text = result.TrackingNumber.ToString();
                 LblAmount.Text = result.Amount.ToString();
                 LblGateway.Text = result.GatewayName;
diff --git a/samples/Parbad.Sample.WebForm/Verify.aspx.cs b/samples/Parbad.Sample.WebForm/Verify.aspx.cs
index 296e7a2a..9fd0e908 100644
--- a/samples/Parbad.Sample.WebForm/Verify.aspx.cs
+++ b/samples/Parbad.Sample.WebForm/Verify.aspx.cs
@@ -12,6 +12,7 @@ protected async void Page_Load(object sender, EventArgs e)
 
             var invoice = await StaticOnlinePayment.Instance.FetchAsync();
 
+            // This is an example of cancelling an invoice when you think that the payment process must be stopped.
             if (Is_There_Still_Product_In_Shop(invoice.TrackingNumber))
             {
                 var verifyResult = await StaticOnlinePayment.Instance.VerifyAsync(invoice);