diff --git a/src/customer/decorators.py b/src/customer/decorators.py
index b2051ca..5a0c8e9 100644
--- a/src/customer/decorators.py
+++ b/src/customer/decorators.py
@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 from django.contrib.auth.decorators import user_passes_test
-from django.core.urlresolvers  import reverse
+
 
 def license_required(function=None, redirect_field_name=None, login_url='/my/license/'):
     """
diff --git a/src/customer/helpers.py b/src/customer/helpers.py
new file mode 100644
index 0000000..ebcc3fa
--- /dev/null
+++ b/src/customer/helpers.py
@@ -0,0 +1,15 @@
+# -*- coding: utf-8 -*-
+from customer.models import Client
+
+
+def partner_already_exists(user_as_company, partner_inn):
+    """
+
+    :param user_as_company: 
+    :param partner_inn: 
+    :return: 
+    """
+    if Client.objects.filter(company=user_as_company, inn=partner_inn):
+        return True
+    else:
+        return False
diff --git a/src/customer/utils.py b/src/customer/utils.py
index cea368c..0c4fd88 100644
--- a/src/customer/utils.py
+++ b/src/customer/utils.py
@@ -5,7 +5,6 @@ from django.conf import settings
 from django.core.mail import EmailMessage
 from django.template.loader import render_to_string
 
-
 SUPPORT_EMAIL = getattr(settings, 'SUPPORT_EMAIL')
 
 
diff --git a/src/customer/views/clients_ajax.py b/src/customer/views/clients_ajax.py
index b58f55a..e02c302 100644
--- a/src/customer/views/clients_ajax.py
+++ b/src/customer/views/clients_ajax.py
@@ -11,8 +11,8 @@ from django.template.loader import render_to_string
 
 from customer import models, forms
 from docs.models import Invoice, Faktura, AktRabot, AktSverki, Nakladn, Platejka, Dover
-from customer.decorators import license_required
 from customer.utils import raise_if_no_profile
+from customer.helpers import partner_already_exists
 
 
 @login_required
@@ -47,21 +47,35 @@ def clients_add_ajax(request):
     raise_if_no_profile(request)
 
     form_class = forms.ClientForm
-
-    new_client_id = None
     new_client_str = None
     form = form_class(data=request.POST)
 
     new_client_id = None
     html = ''
     if form.is_valid():
-        new_client = form.save(commit=False)
-        new_client.company = request.user.profile
-        new_client_str = new_client.name
-        new_client.save()
-        new_client_id = new_client.id
-        html = render_to_string('customer/clients/list_item.html', 
-                {'obj': new_client}, RequestContext(request))
+        # check company has in users clients
+        if partner_already_exists(request.user.profile, form.cleaned_data['inn']):
+
+            data = {
+                'success': False,
+                'field_errors': {'inn': []},
+                'form_errors': ['Контрагент с таким ИНН уже существует.'],
+                'reload': False,
+                'id': None,
+                'name': None,
+                'action': 'client-add',
+                'row_html': '',
+            }
+
+            return HttpResponse(json.dumps(data), content_type='application/json')
+        else:
+            new_client = form.save(commit=False)
+            new_client.company = request.user.profile
+            new_client_str = new_client.name
+            new_client.save()
+            new_client_id = new_client.id
+            html = render_to_string('customer/clients/list_item.html',
+                    {'obj': new_client}, RequestContext(request))
 
     non_field_errors = form.non_field_errors()
     if not form.is_valid():
@@ -71,7 +85,6 @@ def clients_add_ajax(request):
         'success': form.is_valid(),
         'field_errors': form.errors, # ошибки полей
         'form_errors': non_field_errors, # ошибки формы
-        #'reload': form.is_valid() and 'reload_on_success' in request.GET
         'reload': False,
         'id': new_client_id,
         'name': new_client_str,
@@ -100,7 +113,7 @@ def clients_edit_ajax(request, id):
         client = form.save()
 
     non_field_errors = form.non_field_errors()
-    html = render_to_string('customer/clients/list_item.html', 
+    html = render_to_string('customer/clients/list_item.html',
             {'obj': client}, RequestContext(request))
     if not form.is_valid():
         non_field_errors.append(u'Заполните/исправьте выделенные поля.')
@@ -132,13 +145,13 @@ def clients_delete_ajax(request, id):
 
     client = get_object_or_404(models.Client, pk=id, company=request.user.profile)
     client_docs = []
-    doc_list = [(Invoice, u'счета'), (Faktura, u'счета-фактуры'), (Nakladn, u'накладные'), 
+    doc_list = [(Invoice, u'счета'), (Faktura, u'счета-фактуры'), (Nakladn, u'накладные'),
             (AktRabot, u'акты выполненных работ'), (Platejka, u'платёжные поручения'),
             (Dover, u'доверенности'), (AktSverki, u'акты сверки')]
     for doc in doc_list:
         docs = doc[0].objects.filter(client=client)
         if docs:
-           client_docs.append(doc[1]) 
+           client_docs.append(doc[1])
 
     if not client_docs:
         client.delete()
@@ -153,7 +166,7 @@ def clients_delete_ajax(request, id):
     data = {
         'success': success,
         'message': message,
-        'reload': False, 
+        'reload': False,
         'action': 'client-delete',
         'id': del_id,
     }