diff --git a/Course/ImplementerApp/Controllers/DetailController.cs b/Course/ImplementerApp/Controllers/DetailController.cs
index ce46fca..21c1413 100644
--- a/Course/ImplementerApp/Controllers/DetailController.cs
+++ b/Course/ImplementerApp/Controllers/DetailController.cs
@@ -17,7 +17,6 @@ namespace ImplementerApp.Controllers
         private bool IsLoggedIn { get { return UserImplementer.user != null; } }
         private int UserId { get { return UserImplementer.user!.Id; } }
 
-
         [HttpGet]
         public IActionResult IndexDetail()
         {
@@ -57,8 +56,13 @@ namespace ImplementerApp.Controllers
             {
                 model.DateCreate = DateTime.Now;
                 model.UserId = UserImplementer.user!.Id;
-                if (_data.CreateDetail(model))
-                    return RedirectToAction("IndexDetail");
+                try {
+                    if (_data.CreateDetail(model))
+                        return RedirectToAction("IndexDetail");
+                } catch (ArgumentException ex)
+                {
+                    return RedirectToAction("Error", ex.Message);
+                }
             }
             else
             {
@@ -69,9 +73,9 @@ namespace ImplementerApp.Controllers
         }
 
         [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
-        public IActionResult Error()
+        public IActionResult Error(string ex)
         {
-            return View();
+            return View(ex);
         }
     }
 }
diff --git a/Course/ImplementerApp/Controllers/HomeController.cs b/Course/ImplementerApp/Controllers/HomeController.cs
index 4177736..6aaf48d 100644
--- a/Course/ImplementerApp/Controllers/HomeController.cs
+++ b/Course/ImplementerApp/Controllers/HomeController.cs
@@ -22,7 +22,12 @@ namespace ImplementerApp.Controllers
         private bool IsLoggedIn { get { return UserImplementer.user != null; } }
         private int UserId { get { return UserImplementer.user!.Id; } }
 
-
+        [HttpPost]
+        public JsonResult CheckLogin(string login)
+        {
+            var unique = _data.CheckLogin(login);
+            return Json(new { isUnique = unique });
+        }
         public IActionResult IndexNonReg()
         {
             if (!IsLoggedIn)
diff --git a/Course/ImplementerApp/Controllers/ProductController.cs b/Course/ImplementerApp/Controllers/ProductController.cs
index 463ec3c..c52a317 100644
--- a/Course/ImplementerApp/Controllers/ProductController.cs
+++ b/Course/ImplementerApp/Controllers/ProductController.cs
@@ -17,7 +17,7 @@ namespace ImplementerApp.Controllers
         private bool IsLoggedIn { get { return UserImplementer.user != null; } }
         private int UserId { get { return UserImplementer.user!.Id; } }
 
-
+ 
         [HttpGet]
         public IActionResult IndexProduct()
         {
diff --git a/Course/ImplementerApp/Controllers/ProductionController.cs b/Course/ImplementerApp/Controllers/ProductionController.cs
index 0980968..c19e39a 100644
--- a/Course/ImplementerApp/Controllers/ProductionController.cs
+++ b/Course/ImplementerApp/Controllers/ProductionController.cs
@@ -16,8 +16,6 @@ namespace ImplementerApp.Controllers
         }
         private bool IsLoggedIn { get { return UserImplementer.user != null; } }
         private int UserId { get { return UserImplementer.user!.Id; } }
-
-
         [HttpGet]
         public IActionResult IndexProduction()
         {
diff --git a/Course/ImplementerApp/ImplementerData.cs b/Course/ImplementerApp/ImplementerData.cs
index 6146b60..1a27d39 100644
--- a/Course/ImplementerApp/ImplementerData.cs
+++ b/Course/ImplementerApp/ImplementerData.cs
@@ -89,6 +89,10 @@ namespace ImplementerApp
 		{
 			return _detailLogic.ReadElement(new() { Id= id });
 		}
+		public bool CheckDetailName(string name)
+		{
+			return _detailLogic.ReadElement(new() { Name = name }) == null;
+		}
 
 		public List<ProductViewModel>? GetProducts(int userId)
 		{
@@ -110,8 +114,12 @@ namespace ImplementerApp
 		{
 			return _productLogic.Create(model);
 		}
+        public bool CheckProductName(string name)
+        {
+            return _productLogic.ReadElement(new() { Name = name }) == null;
+        }
 
-		public List<ProductionViewModel>? GetProductions(int userId)
+        public List<ProductionViewModel>? GetProductions(int userId)
 		{
 			return _productionLogic.ReadList(new() { UserId = userId });
 		}
@@ -130,9 +138,13 @@ namespace ImplementerApp
 		public bool DeleteProduction(int productionId)
 		{
 			return _productionLogic.Delete(new() { Id = productionId});
-		}	  
-	
-		public List<MachineViewModel>? GetMachines()
+		}
+        public bool CheckProductionName(string name)
+        {
+            return _productionLogic.ReadElement(new() { Name = name }) == null;
+        }
+
+        public List<MachineViewModel>? GetMachines()
 		{
 			return _machineLogic.ReadList(null);
 		}
diff --git a/Course/ImplementerApp/Views/Home/Privacy.cshtml b/Course/ImplementerApp/Views/Home/Privacy.cshtml
index e68278d..d6c3496 100644
--- a/Course/ImplementerApp/Views/Home/Privacy.cshtml
+++ b/Course/ImplementerApp/Views/Home/Privacy.cshtml
@@ -43,6 +43,26 @@
 <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
 <script>
     $(document).ready(function () {
+        $('#login').blur(function () {
+            var login = $('#login').val();
+            if (login.length >= 5 && login.length <= 50) {
+                $.ajax({
+                    url: '@Url.Action("CheckLogin", "Home")',
+                    type: 'POST',
+                    data: { login: login },
+                    success: function (response) {
+                        if (!response.isUnique) {
+                            $('#loginError').text('Логин уже используется.');
+                        } else {
+                            $('#loginError').text('');
+                        }
+                    },
+                    error: function () {
+                        $('#loginError').text('Ошибка при проверке уникальности логина.');
+                    }
+                });
+            }
+        });
         $('#clientForm').submit(function(event) {
             var login = $('#login').val();
             var email = $('#email').val();
diff --git a/Course/ImplementerApp/Views/Home/Register.cshtml b/Course/ImplementerApp/Views/Home/Register.cshtml
index 20b54f4..5ca8f0e 100644
--- a/Course/ImplementerApp/Views/Home/Register.cshtml
+++ b/Course/ImplementerApp/Views/Home/Register.cshtml
@@ -54,7 +54,7 @@
             var login = $('#login').val();
             if (login.length >= 5 && login.length <= 50) {
                 $.ajax({
-                    url: '@Url.Action("CheckLoginUnique", "YourController")',
+                    url: '@Url.Action("CheckLogin", "Home")',
                     type: 'POST',
                     data: { login: login },
                     success: function (response) {