diff --git a/Company.Domain/InstitutionContractSendFlagAgg/InstitutionContractSendFlag.cs b/Company.Domain/InstitutionContractSendFlagAgg/InstitutionContractSendFlag.cs
index 20d951a0..2b3a7137 100644
--- a/Company.Domain/InstitutionContractSendFlagAgg/InstitutionContractSendFlag.cs
+++ b/Company.Domain/InstitutionContractSendFlagAgg/InstitutionContractSendFlag.cs
@@ -54,7 +54,7 @@ public class InstitutionContractSendFlag
     /// <summary>
     /// علامت‌گذاری قرارداد به عنوان ارسال‌شده
     /// </summary>
-    public void MarkAsSent(string reason = null)
+    public void MarkAsSent()
     {
         IsSent = true;
         SentDate = DateTime.Now;
diff --git a/CompanyManagment.App.Contracts/InstitutionContract/IInstitutionContractApplication.cs b/CompanyManagment.App.Contracts/InstitutionContract/IInstitutionContractApplication.cs
index 10266d6c..dc8edb1e 100644
--- a/CompanyManagment.App.Contracts/InstitutionContract/IInstitutionContractApplication.cs
+++ b/CompanyManagment.App.Contracts/InstitutionContract/IInstitutionContractApplication.cs
@@ -305,6 +305,14 @@ public interface IInstitutionContractApplication
     Task<InstitutionContractDiscountResponse> SetDiscountForCreation(InstitutionContractSetDiscountForCreationRequest request);
     Task<InstitutionContractDiscountResponse> ResetDiscountForCreation(InstitutionContractResetDiscountForExtensionRequest request);
     Task<OperationResult> CreationComplete(InstitutionContractExtensionCompleteRequest request);
+
+    /// <summary>
+    /// تعیین فلگ ارسال قرارداد در MongoDB
+    /// اگر فلگ وجود نداشتن‌د ایجاد می‌کند
+    /// </summary>
+    /// <param name="request">درخواست تعیین فلگ</param>
+    /// <returns>نتیجه عملیات</returns>
+    Task<OperationResult> SetContractSendFlag(SetInstitutionContractSendFlagRequest request);
 }
 
 public class CreationSetContractingPartyResponse
diff --git a/CompanyManagment.App.Contracts/InstitutionContract/SetInstitutionContractSendFlagRequest.cs b/CompanyManagment.App.Contracts/InstitutionContract/SetInstitutionContractSendFlagRequest.cs
new file mode 100644
index 00000000..e19bacf5
--- /dev/null
+++ b/CompanyManagment.App.Contracts/InstitutionContract/SetInstitutionContractSendFlagRequest.cs
@@ -0,0 +1,19 @@
+namespace CompanyManagment.App.Contracts.InstitutionContract;
+
+/// <summary>
+/// درخواست برای تعیین فلگ ارسال قرارداد
+/// </summary>
+public class SetInstitutionContractSendFlagRequest
+{
+    /// <summary>
+    /// شناسه قرارداد
+    /// </summary>
+    public long InstitutionContractId { get; set; }
+
+    /// <summary>
+    /// آیا قرارداد ارسال شده است
+    /// </summary>
+    public bool IsSent { get; set; }
+    
+}
+
diff --git a/CompanyManagment.Application/InstitutionContractApplication.cs b/CompanyManagment.Application/InstitutionContractApplication.cs
index 5790aaee..94da79fc 100644
--- a/CompanyManagment.Application/InstitutionContractApplication.cs
+++ b/CompanyManagment.Application/InstitutionContractApplication.cs
@@ -19,6 +19,7 @@ using Company.Domain.PaymentTransactionAgg;
 using Company.Domain.RepresentativeAgg;
 using Company.Domain.RollCallServiceAgg;
 using Company.Domain.WorkshopAgg;
+using Company.Domain.InstitutionContractSendFlagAgg;
 using CompanyManagment.App.Contracts.FinancialInvoice;
 using CompanyManagment.App.Contracts.FinancialStatment;
 using CompanyManagment.App.Contracts.InstitutionContract;
@@ -51,6 +52,7 @@ public class InstitutionContractApplication : IInstitutionContractApplication
     private readonly IPaymentTransactionRepository _paymentTransactionRepository;
     private readonly IRollCallServiceRepository _rollCallServiceRepository;
     private readonly ISepehrPaymentGatewayService _sepehrPaymentGatewayService;
+    private readonly IInstitutionContractSendFlagRepository _institutionContractSendFlagRepository;
 
 
     public InstitutionContractApplication(IInstitutionContractRepository institutionContractRepository,
@@ -62,7 +64,8 @@ public class InstitutionContractApplication : IInstitutionContractApplication
         IAccountApplication accountApplication, ISmsService smsService,
         IFinancialInvoiceRepository financialInvoiceRepository, IHttpClientFactory httpClientFactory,
         IPaymentTransactionRepository paymentTransactionRepository, IRollCallServiceRepository rollCallServiceRepository,
-        ISepehrPaymentGatewayService sepehrPaymentGatewayService,ILogger<SepehrPaymentGateway> sepehrGatewayLogger)
+        ISepehrPaymentGatewayService sepehrPaymentGatewayService,ILogger<SepehrPaymentGateway> sepehrGatewayLogger,
+        IInstitutionContractSendFlagRepository institutionContractSendFlagRepository)
     {
         _institutionContractRepository = institutionContractRepository;
         _contractingPartyRepository = contractingPartyRepository;
@@ -80,6 +83,7 @@ public class InstitutionContractApplication : IInstitutionContractApplication
         _rollCallServiceRepository = rollCallServiceRepository;
         _sepehrPaymentGatewayService = sepehrPaymentGatewayService;
         _paymentGateway = new SepehrPaymentGateway(httpClientFactory,sepehrGatewayLogger);
+        _institutionContractSendFlagRepository = institutionContractSendFlagRepository;
     }
 
 	public OperationResult Create(CreateInstitutionContract command)
@@ -1820,7 +1824,60 @@ public class InstitutionContractApplication : IInstitutionContractApplication
             installments.Add(lastInstallment);
             return installments;
         }
+
+     
     }
+       /// <summary>
+        /// تعیین فلگ ارسال قرارداد
+        /// اگر فلگ وجود نداشتن‌د ایجاد می‌کند
+        /// </summary>
+        public async Task<OperationResult> SetContractSendFlag(SetInstitutionContractSendFlagRequest request)
+        {
+            var operationResult = new OperationResult();
+
+            try
+            {
+                // بازیابی قرارداد از SQL
+                var contract = _institutionContractRepository.Get(request.InstitutionContractId);
+                if (contract == null)
+                    return operationResult.Failed("قرارداد مورد نظر یافت نشد");
+
+                // بررسی اینکه آیا فلگ در MongoDB وجود دارد
+                var existingFlag = await _institutionContractSendFlagRepository
+                    .GetByContractId(request.InstitutionContractId);
+
+                if (existingFlag != null)
+                {
+                    // اگر فلگ وجود داشتن‌د، آن را اپدیت کنیم
+                    if (request.IsSent)
+                    {
+                        existingFlag.MarkAsSent();
+                    }
+                    else
+                    {
+                        existingFlag.MarkAsNotSent();
+                    }
+                    existingFlag.UpdateLastModified();
+                    await _institutionContractSendFlagRepository.Update(existingFlag);
+                }
+                else
+                {
+                    // اگر فلگ وجود ندارد، آن را ایجاد کنیم
+                    var newFlag = new InstitutionContractSendFlag(
+                        request.InstitutionContractId,
+                        request.IsSent
+                    );
+
+                    await _institutionContractSendFlagRepository.Create(newFlag);
+                }
+
+                return operationResult.Succcedded();
+            }
+            catch (Exception ex)
+            {
+                return operationResult.Failed($"خطا در تعیین فلگ ارسال: {ex.Message}");
+            }
+        }
 }
 
 #region CustomViewModels