diff --git a/src/BackOffice/Common/Utilities/CsvExportHelper.cs b/src/BackOffice/Common/Utilities/CsvExportHelper.cs
new file mode 100644
index 0000000..6e6b4cf
--- /dev/null
+++ b/src/BackOffice/Common/Utilities/CsvExportHelper.cs
@@ -0,0 +1,57 @@
+using System.Globalization;
+using System.Text;
+
+namespace BackOffice.Common.Utilities;
+
+/// <summary>
+/// خروجی CSV سازگار با Excel (UTF-8 BOM + sep=, + اعداد بدون جداکننده هزارگان).
+/// </summary>
+public static class CsvExportHelper
+{
+    public const char Separator = ',';
+
+    public static string Escape(string? value)
+    {
+        if (string.IsNullOrEmpty(value))
+            return string.Empty;
+
+        if (value.Contains(Separator) || value.Contains('"') || value.Contains('\n') || value.Contains('\r'))
+            return $"\"{value.Replace("\"", "\"\"")}\"";
+
+        return value;
+    }
+
+    public static string Cell(object? value) => value switch
+    {
+        null => string.Empty,
+        string s => Escape(s),
+        bool b => b ? "1" : "0",
+        IFormattable f => Escape(f.ToString(null, CultureInfo.InvariantCulture) ?? string.Empty),
+        _ => Escape(Convert.ToString(value, CultureInfo.InvariantCulture))
+    };
+
+    public static string Row(params object?[] cells) =>
+        string.Join(Separator, cells.Select(Cell));
+
+    /// <summary>
+    /// نام نمایشی مشتری؛ اگر خالی باشد موبایل یا شناسه کاربر.
+    /// </summary>
+    public static string CustomerName(string? fullName, string? mobile = null, long? userId = null)
+    {
+        if (!string.IsNullOrWhiteSpace(fullName))
+            return fullName.Trim();
+        if (!string.IsNullOrWhiteSpace(mobile))
+            return mobile.Trim();
+        if (userId is > 0)
+            return $"کاربر {userId}";
+        return "—";
+    }
+
+    public static string ToBase64(StringBuilder bodyWithoutSepHint)
+    {
+        // Excel در لوکال فارسی با این خط، جداکننده کاما را درست تشخیص می‌دهد
+        var content = "sep=," + Environment.NewLine + bodyWithoutSepHint;
+        var bytes = Encoding.UTF8.GetPreamble().Concat(Encoding.UTF8.GetBytes(content)).ToArray();
+        return Convert.ToBase64String(bytes);
+    }
+}
diff --git a/src/BackOffice/Pages/DiscountShop/DiscountOrdersMainPage.razor.cs b/src/BackOffice/Pages/DiscountShop/DiscountOrdersMainPage.razor.cs
index 0dd0373..50db2e1 100644
--- a/src/BackOffice/Pages/DiscountShop/DiscountOrdersMainPage.razor.cs
+++ b/src/BackOffice/Pages/DiscountShop/DiscountOrdersMainPage.razor.cs
@@ -1,5 +1,6 @@
 using System.Text;
 using BackOffice.Common.BaseComponents;
+using BackOffice.Common.Utilities;
 using BackOffice.Services.DiscountOrder;
 using BackOffice.Pages.DiscountShop.Components;
 using Microsoft.AspNetCore.Components;
@@ -245,30 +246,29 @@ public partial class DiscountOrdersMainPage
         try
         {
             var sb = new StringBuilder();
-            sb.AppendLine("شناسه,نام کاربر,موبایل,مبلغ کل,کیف پول اعتباری,پرداخت درگاه,تعداد آیتم,وضعیت پرداخت,وضعیت ارسال,تاریخ پرداخت,تاریخ ثبت,آدرس");
+            sb.AppendLine(CsvExportHelper.Row(
+                "شناسه", "نام مشتری", "موبایل", "مبلغ کل", "کیف پول اعتباری", "پرداخت درگاه",
+                "تعداد آیتم", "وضعیت پرداخت", "وضعیت ارسال", "تاریخ پرداخت", "تاریخ ثبت", "آدرس"));
 
             foreach (var o in _orders)
             {
-                sb.AppendLine(string.Join(",",
+                sb.AppendLine(CsvExportHelper.Row(
                     o.Id,
-                    EscapeCsv(o.UserFullName),
-                    EscapeCsv(o.UserMobile),
-                    o.TotalPrice.ToString("N0"),
-                    o.DiscountBalanceUsed.ToString("N0"),
-                    o.GatewayAmount.ToString("N0"),
+                    CsvExportHelper.CustomerName(o.UserFullName, o.UserMobile, o.UserId),
+                    o.UserMobile,
+                    o.TotalPrice,
+                    o.DiscountBalanceUsed,
+                    o.GatewayAmount,
                     o.ItemsCount,
-                    EscapeCsv(GetPaymentStatusText(o.PaymentStatusValue)),
-                    EscapeCsv(GetStatusText(o.Status)),
+                    GetPaymentStatusText(o.PaymentStatusValue),
+                    GetStatusText(o.Status),
                     o.PaymentDate?.MiladiToJalaliWithTime() ?? "-",
                     o.Created?.MiladiToJalaliWithTime() ?? "-",
-                    EscapeCsv(o.ShippingAddress ?? "-")));
+                    o.ShippingAddress ?? "-"));
             }
 
-            var bytes = Encoding.UTF8.GetPreamble().Concat(Encoding.UTF8.GetBytes(sb.ToString())).ToArray();
-            var base64 = Convert.ToBase64String(bytes);
             var filename = $"discount-orders-{DateTime.Now:yyyyMMddHHmmss}.csv";
-
-            await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename, base64);
+            await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename, CsvExportHelper.ToBase64(sb));
             Snackbar.Add("خروجی Excel (CSV) آماده شد.", Severity.Success);
         }
         catch (Exception ex)
@@ -276,12 +276,4 @@ public partial class DiscountOrdersMainPage
             Snackbar.Add($"خطا در خروجی Excel: {ex.Message}", Severity.Error);
         }
     }
-
-    private static string EscapeCsv(string value)
-    {
-        if (string.IsNullOrEmpty(value)) return "";
-        if (value.Contains(',') || value.Contains('"') || value.Contains('\n'))
-            return $"\"{value.Replace("\"", "\"\"")}\"";
-        return value;
-    }
 }
diff --git a/src/BackOffice/Pages/DiscountShop/SalesReports.razor b/src/BackOffice/Pages/DiscountShop/SalesReports.razor
index a58b7af..fc65969 100644
--- a/src/BackOffice/Pages/DiscountShop/SalesReports.razor
+++ b/src/BackOffice/Pages/DiscountShop/SalesReports.razor
@@ -531,14 +531,15 @@
         }
 
         var sb = new StringBuilder();
-        sb.AppendLine("شناسه,نام کاربر,موبایل,تاریخ ثبت,تعداد آیتم,مبلغ نهایی,تخفیف,وضعیت");
+        sb.AppendLine(CsvExportHelper.Row(
+            "شناسه", "نام مشتری", "موبایل", "تاریخ ثبت", "تعداد آیتم", "مبلغ نهایی", "تخفیف", "وضعیت"));
 
         foreach (var o in _orders.Where(o => o.Created.HasValue).OrderBy(o => o.Created))
         {
-            sb.AppendLine(string.Join(",",
+            sb.AppendLine(CsvExportHelper.Row(
                 o.Id,
-                EscapeCsv(o.UserFullName),
-                EscapeCsv(o.UserMobile),
+                CsvExportHelper.CustomerName(o.UserFullName, o.UserMobile, o.UserId),
+                o.UserMobile,
                 o.Created?.MiladiToJalaliWithTime() ?? "-",
                 o.ItemsCount,
                 o.GatewayAmount,
@@ -546,11 +547,8 @@
                 GetStatusText(o.Status)));
         }
 
-        var bytes = Encoding.UTF8.GetPreamble().Concat(Encoding.UTF8.GetBytes(sb.ToString())).ToArray();
-        var base64 = Convert.ToBase64String(bytes);
         var filename = $"discount-sales-{DateTime.Now:yyyyMMddHHmmss}.csv";
-
-        await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename, base64);
+        await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename, CsvExportHelper.ToBase64(sb));
         Snackbar.Add("خروجی Excel (CSV) آماده شد.", Severity.Success);
     }
 
@@ -575,12 +573,12 @@
         sb.AppendLine();
 
         sb.AppendLine("جزئیات سفارش‌ها:");
-        sb.AppendLine("شناسه | نام کاربر | تاریخ | تعداد آیتم | مبلغ نهایی | تخفیف | وضعیت");
+        sb.AppendLine("شناسه | نام مشتری | تاریخ | تعداد آیتم | مبلغ نهایی | تخفیف | وضعیت");
 
         foreach (var o in _orders.Where(o => o.Created.HasValue).OrderBy(o => o.Created))
         {
             sb.AppendLine(
-                $"{o.Id} | {o.UserFullName} | {o.Created?.MiladiToJalaliWithTime() ?? "-"} | {o.ItemsCount} | {o.GatewayAmount:N0} | {o.DiscountBalanceUsed:N0} | {GetStatusText(o.Status)}");
+                $"{o.Id} | {CsvExportHelper.CustomerName(o.UserFullName, o.UserMobile, o.UserId)} | {o.Created?.MiladiToJalaliWithTime() ?? "-"} | {o.ItemsCount} | {o.GatewayAmount:N0} | {o.DiscountBalanceUsed:N0} | {GetStatusText(o.Status)}");
         }
 
         var bytes = Encoding.UTF8.GetPreamble().Concat(Encoding.UTF8.GetBytes(sb.ToString())).ToArray();
@@ -590,14 +588,4 @@
         await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename, base64);
         Snackbar.Add("خروجی PDF (نسخه متنی) آماده شد.", Severity.Success);
     }
-
-    private static string EscapeCsv(string value)
-    {
-        if (string.IsNullOrEmpty(value))
-            return "";
-
-        var needsQuotes = value.Contains(',') || value.Contains('"') || value.Contains('\n');
-        var escaped = value.Replace("\"", "\"\"");
-        return needsQuotes ? $"\"{escaped}\"" : escaped;
-    }
 }
diff --git a/src/BackOffice/Pages/UserOrder/OrderSalesReports.razor.cs b/src/BackOffice/Pages/UserOrder/OrderSalesReports.razor.cs
index a49698c..4fe7a70 100644
--- a/src/BackOffice/Pages/UserOrder/OrderSalesReports.razor.cs
+++ b/src/BackOffice/Pages/UserOrder/OrderSalesReports.razor.cs
@@ -1,4 +1,5 @@
 using System.Text;
+using BackOffice.Common.Utilities;
 using CMSMicroservice.Protobuf.Protos;
 using CMSMicroservice.Protobuf.Protos.UserOrder;
 using Microsoft.AspNetCore.Components;
@@ -244,25 +245,23 @@ public partial class OrderSalesReports
         }
 
         var sb = new StringBuilder();
-        sb.AppendLine("شناسه,کاربر,نام کاربر,مبلغ,وضعیت پرداخت,وضعیت ارسال,تاریخ پرداخت");
+        sb.AppendLine(CsvExportHelper.Row(
+            "شناسه", "کاربر", "نام مشتری", "مبلغ", "وضعیت پرداخت", "وضعیت ارسال", "تاریخ پرداخت"));
 
         foreach (var o in _orders)
         {
-            sb.AppendLine(string.Join(",",
+            sb.AppendLine(CsvExportHelper.Row(
                 o.Id,
                 o.UserId,
-                EscapeCsv(o.UserFullName),
+                CsvExportHelper.CustomerName(o.UserFullName, userId: o.UserId),
                 o.Amount,
-                EscapeCsv(o.PaymentStatus == PaymentStatus.Success ? "پرداخت شده" : "پرداخت نشده"),
-                EscapeCsv(GetDeliveryStatusText(o.DeliveryStatus.GetHashCode())),
+                o.PaymentStatus == PaymentStatus.Success ? "پرداخت شده" : "پرداخت نشده",
+                GetDeliveryStatusText(o.DeliveryStatus.GetHashCode()),
                 o.PaymentDate != null ? o.PaymentDate.ToDateTime().MiladiToJalaliWithTime() : "-"));
         }
 
-        var bytes = Encoding.UTF8.GetPreamble().Concat(Encoding.UTF8.GetBytes(sb.ToString())).ToArray();
-        var base64 = Convert.ToBase64String(bytes);
         var filename = $"store-sales-{DateTime.Now:yyyyMMddHHmmss}.csv";
-
-        await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename, base64);
+        await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename, CsvExportHelper.ToBase64(sb));
         Snackbar.Add("خروجی Excel (CSV) آماده شد.", Severity.Success);
     }
 
@@ -292,7 +291,7 @@ public partial class OrderSalesReports
         foreach (var o in _orders)
         {
             sb.AppendLine(
-                $"{o.Id} | {o.UserFullName} | {o.Amount:N0} | {(o.PaymentStatus == PaymentStatus.Success ? "پرداخت شده" : "پرداخت نشده")} | {GetDeliveryStatusText(o.DeliveryStatus.GetHashCode())} | {(o.PaymentDate != null ? o.PaymentDate.ToDateTime().MiladiToJalaliWithTime() : "-")}");
+                $"{o.Id} | {CsvExportHelper.CustomerName(o.UserFullName, userId: o.UserId)} | {o.Amount:N0} | {(o.PaymentStatus == PaymentStatus.Success ? "پرداخت شده" : "پرداخت نشده")} | {GetDeliveryStatusText(o.DeliveryStatus.GetHashCode())} | {(o.PaymentDate != null ? o.PaymentDate.ToDateTime().MiladiToJalaliWithTime() : "-")}");
         }
 
         var bytes = Encoding.UTF8.GetPreamble().Concat(Encoding.UTF8.GetBytes(sb.ToString())).ToArray();
@@ -351,12 +350,4 @@ public partial class OrderSalesReports
             }
         };
     }
-
-    private static string EscapeCsv(string value)
-    {
-        if (string.IsNullOrEmpty(value)) return "";
-        if (value.Contains(',') || value.Contains('"') || value.Contains('\n'))
-            return $"\"{value.Replace("\"", "\"\"")}\"";
-        return value;
-    }
 }
diff --git a/src/BackOffice/Pages/UserOrder/UserOrderMainPage.razor.cs b/src/BackOffice/Pages/UserOrder/UserOrderMainPage.razor.cs
index 2681678..04aaeb4 100644
--- a/src/BackOffice/Pages/UserOrder/UserOrderMainPage.razor.cs
+++ b/src/BackOffice/Pages/UserOrder/UserOrderMainPage.razor.cs
@@ -1,8 +1,9 @@
-using System.Text.Json;
-using System.Text;
+using System.Text;
+using System.Text.Json;
+using BackOffice.Common.BaseComponents;
+using BackOffice.Common.Utilities;
 using CMSMicroservice.Protobuf.Protos;
 using CMSMicroservice.Protobuf.Protos.UserOrder;
-using BackOffice.Common.BaseComponents;
 using Microsoft.AspNetCore.Components;
 using Microsoft.JSInterop;
 using MudBlazor;
@@ -242,6 +243,15 @@ public partial class UserOrderMainPage
         };
     }
 
+    // Domain PaymentStatus: Success=0, Reject=1, Pending=2
+    private static string GetPaymentStatusText(int status) => status switch
+    {
+        0 => "پرداخت شده",
+        1 => "پرداخت ناموفق",
+        2 => "در انتظار پرداخت",
+        _ => "نامشخص"
+    };
+
     private async Task OpenChangeStatus(DataModel model)
     {
         var parameters = new DialogParameters
@@ -320,26 +330,24 @@ public partial class UserOrderMainPage
             }
 
             var sb = new StringBuilder();
-            sb.AppendLine("شناسه,کاربر,نام کاربر,مبلغ,وضعیت پرداخت,وضعیت ارسال,روش پرداخت,تاریخ پرداخت");
+            sb.AppendLine(CsvExportHelper.Row(
+                "شناسه", "کاربر", "نام مشتری", "مبلغ", "وضعیت پرداخت", "وضعیت ارسال", "روش پرداخت", "تاریخ پرداخت"));
 
             foreach (var o in result.Models)
             {
-                sb.AppendLine(string.Join(",",
+                sb.AppendLine(CsvExportHelper.Row(
                     o.Id,
                     o.UserId,
-                    EscapeCsv(o.UserFullName),
+                    CsvExportHelper.CustomerName(o.UserFullName, userId: o.UserId),
                     o.Amount,
-                    EscapeCsv(o.PaymentStatus.ToString()),
-                    EscapeCsv(GetDeliveryStatusText(o.DeliveryStatus.GetHashCode())),
-                    EscapeCsv(GetPaymentMethodText(o.PaymentMethod.GetHashCode())),
+                    GetPaymentStatusText(o.PaymentStatus.GetHashCode()),
+                    GetDeliveryStatusText(o.DeliveryStatus.GetHashCode()),
+                    GetPaymentMethodText(o.PaymentMethod.GetHashCode()),
                     o.PaymentDate?.ToDateTime().ToLocalTime().MiladiToJalaliWithTime() ?? "-"));
             }
 
-            var bytes = Encoding.UTF8.GetPreamble().Concat(Encoding.UTF8.GetBytes(sb.ToString())).ToArray();
-            var base64 = Convert.ToBase64String(bytes);
             var filename = $"user-orders-{DateTime.Now:yyyyMMddHHmmss}.csv";
-
-            await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename, base64);
+            await JsRuntime.InvokeVoidAsync("jsSaveAsFile", filename, CsvExportHelper.ToBase64(sb));
             Snackbar.Add("خروجی Excel (CSV) آماده شد.", Severity.Success);
         }
         catch (Exception ex)
@@ -347,12 +355,4 @@ public partial class UserOrderMainPage
             Snackbar.Add($"خطا در خروجی Excel: {ex.Message}", Severity.Error);
         }
     }
-
-    private static string EscapeCsv(string value)
-    {
-        if (string.IsNullOrEmpty(value)) return "";
-        if (value.Contains(',') || value.Contains('"') || value.Contains('\n'))
-            return $"\"{value.Replace("\"", "\"\"")}\"";
-        return value;
-    }
 }