diff --git a/Altob.NtuInvoiceGateway/Models/InvoiceRequest.cs b/Altob.NtuInvoiceGateway/Models/InvoiceRequest.cs
index 0fb9e2e..8538a2f 100644
--- a/Altob.NtuInvoiceGateway/Models/InvoiceRequest.cs
+++ b/Altob.NtuInvoiceGateway/Models/InvoiceRequest.cs
@@ -44,9 +44,8 @@ public class InvoiceRequest
     [RegularExpression(@"^\d{8}$", ErrorMessage = "統編格式不正確，必須為8位數字")]
     public string? BuyerIdentifier { get; set; } = string.Empty;
 
-    [StringLength(6, ErrorMessage = "愛心碼長度不能超過6碼")]
-    [RegularExpression(@"^$|^\d{6}$", ErrorMessage = "愛心碼須為空值或6位數字")]
-    public string LoveCode { get; set; } = string.Empty;
+    [RegularExpression(@"^$|^\d+$", ErrorMessage = "捐贈碼須為空值或數字")]
+    public string? LoveCode { get; set; } = string.Empty;
 
     [Required(ErrorMessage = "稅別為必填")]
     [StringLength(1, ErrorMessage = "稅別長度不能超過1個字元")]
diff --git a/Altob.NtuInvoiceGateway/Pages/Invoice.cshtml b/Altob.NtuInvoiceGateway/Pages/Invoice.cshtml
index db15e55..cdadbcc 100644
--- a/Altob.NtuInvoiceGateway/Pages/Invoice.cshtml
+++ b/Altob.NtuInvoiceGateway/Pages/Invoice.cshtml
@@ -58,7 +58,7 @@
                         <input type="hidden" asp-for="InvoiceData.TaxType" />
 
                         <div class="alert alert-info mb-4">
-                            <strong>注意：</strong>以下三個選項至少需填寫一個
+                            <strong>注意：</strong>以下四個選項至少需填寫一個
                         </div>
 
                         <div class="row mb-3">
@@ -82,12 +82,12 @@
                                 <small class="form-text text-muted">8位數字</small>
                                 <span asp-validation-for="InvoiceData.BuyerIdentifier" class="text-danger"></span>
                             </div>
-                            @* <div class="col-md-6">
-                                <label asp-for="InvoiceData.LoveCode" class="form-label">愛心碼</label>
+                            <div class="col-md-6">
+                                <label asp-for="InvoiceData.LoveCode" class="form-label">捐贈碼</label>
                                 <input asp-for="InvoiceData.LoveCode" class="form-control" maxlength="7" placeholder="123456" />
                                 <small class="form-text text-muted">輸入為捐贈發票</small>
                                 <span asp-validation-for="InvoiceData.LoveCode" class="text-danger"></span>
-                            </div> *@
+                            </div>
                         </div>
 
                         <div id="submitButtonContainer" class="d-grid gap-2 mt-4 @(string.IsNullOrEmpty(Model.SuccessMessage) ? string.Empty : "d-none")">
@@ -141,7 +141,8 @@
             const requiredGroup = [
                 document.querySelector('input[name="InvoiceData.Email"]'),
                 document.querySelector('input[name="InvoiceData.CarrierID"]'),
-                document.querySelector('input[name="InvoiceData.BuyerIdentifier"]')
+                document.querySelector('input[name="InvoiceData.BuyerIdentifier"]'),
+                document.querySelector('input[name="InvoiceData.LoveCode"]')
             ];
 
             const form = document.querySelector('form[method="post"]');
@@ -179,7 +180,7 @@
                 const hasValue = requiredGroup.some(field => field && field.value.trim() !== '');
                 if (!hasValue) {
                     event.preventDefault();
-                    showError('Email、手機條碼、購買者統編至少需填寫一項。');
+                    showError('Email、手機條碼、購買者統編、捐贈碼至少需填寫一項。');
                     return;
                 }
 
diff --git a/Altob.NtuInvoiceGateway/Pages/Invoice.cshtml.cs b/Altob.NtuInvoiceGateway/Pages/Invoice.cshtml.cs
index c761ccf..2c76fdb 100644
--- a/Altob.NtuInvoiceGateway/Pages/Invoice.cshtml.cs
+++ b/Altob.NtuInvoiceGateway/Pages/Invoice.cshtml.cs
@@ -105,7 +105,8 @@ public class InvoiceModel : PageModel
         // 判斷是否為初始轉頁（三個選項都沒填寫）
         bool isInitialRedirect = string.IsNullOrEmpty(InvoiceData.Email) &&
                                  string.IsNullOrEmpty(InvoiceData.CarrierID) &&
-                                 string.IsNullOrEmpty(InvoiceData.BuyerIdentifier);
+                                 string.IsNullOrEmpty(InvoiceData.BuyerIdentifier) &&
+                                 string.IsNullOrEmpty(InvoiceData.LoveCode);
 
         // 如果是初始轉頁，直接顯示表單讓用戶填寫
         if (isInitialRedirect)
@@ -134,7 +135,7 @@ public class InvoiceModel : PageModel
         if (!string.IsNullOrEmpty(InvoiceData.Email)) filledCount++;
         if (!string.IsNullOrEmpty(InvoiceData.CarrierID)) filledCount++;
         if (!string.IsNullOrEmpty(InvoiceData.BuyerIdentifier)) filledCount++;
-        // if (!string.IsNullOrEmpty(InvoiceData.LoveCode)) filledCount++;
+        if (!string.IsNullOrEmpty(InvoiceData.LoveCode)) filledCount++;
 
         if (filledCount == 0)
         {
@@ -232,13 +233,9 @@ public class InvoiceModel : PageModel
         InvoiceData.TransDateTime = InvoiceData.TransDateTime ?? string.Empty;
         InvoiceData.TransAmount = InvoiceData.TransAmount ?? string.Empty;
         InvoiceData.DeviceID = InvoiceData.DeviceID ?? string.Empty;
-        InvoiceData.Email = InvoiceData.Email ?? string.Empty;
-        InvoiceData.CarrierID = InvoiceData.CarrierID ?? string.Empty;
         InvoiceData.LocationID = InvoiceData.LocationID ?? string.Empty;
         InvoiceData.CarPlateNum = InvoiceData.CarPlateNum ?? string.Empty;
         InvoiceData.OrderID = InvoiceData.OrderID ?? string.Empty;
-        InvoiceData.BuyerIdentifier = InvoiceData.BuyerIdentifier ?? string.Empty;
-        InvoiceData.LoveCode = InvoiceData.LoveCode ?? string.Empty;
         InvoiceData.TaxType = InvoiceData.TaxType ?? string.Empty;
     }
 
diff --git a/Altob.NtuInvoiceGateway/appsettings.json b/Altob.NtuInvoiceGateway/appsettings.json
index fd9c777..cd9dd94 100644
--- a/Altob.NtuInvoiceGateway/appsettings.json
+++ b/Altob.NtuInvoiceGateway/appsettings.json
@@ -31,7 +31,7 @@
   },
   "AllowedHosts": "*",
   "CompanyInfo": {
-    "Name": "國立台灣大學臨時停車場",
+    "Name": "國立臺灣大學臨時停車場",
     "TaxId": "18384226"
   },
   "InvoiceApi": {