diff --git a/BMA.EHR.Retirement.Service/Controllers/RetirementResignController.cs b/BMA.EHR.Retirement.Service/Controllers/RetirementResignController.cs
index f3313301..803e69d8 100644
--- a/BMA.EHR.Retirement.Service/Controllers/RetirementResignController.cs
+++ b/BMA.EHR.Retirement.Service/Controllers/RetirementResignController.cs
@@ -222,7 +222,7 @@ namespace BMA.EHR.Retirement.Service.Controllers
         {
             var getWorkflow = await _permission.GetPermissionAPIWorkflowAsync(id.ToString(), "SYS_RESIGN");
             var createdUserId = await _context.RetirementResigns.AsQueryable()
-                        .Where(x => x.CreatedUserId == UserId ?? "")
+                        .Where(x => x.CreatedUserId == UserId)
                        .FirstOrDefaultAsync();
             if (getWorkflow == false && createdUserId ==null)
             {