diff --git a/categories/forms.py b/categories/forms.py
index 1ccb0c7..c25f26f 100644
--- a/categories/forms.py
+++ b/categories/forms.py
@@ -9,4 +9,15 @@ class CategoryForm(forms.ModelForm):
             'description': forms.Textarea,
             'coordinators' : forms.SelectMultiple,
         }
-        
\ No newline at end of file
+        
+    def clean_name(self):
+        name = self.cleaned_data.get('name')
+        if self.instance.id:
+            same_name = Subject.objects.filter(name__unaccent__iexact = name).exclude(id = self.instance.id)
+        else:
+            same_name = Subject.objects.filter(name__unaccent__iexact = name)
+
+        if same_name.count() > 0:
+            self._errors['name'] = [_('There is another category with this name, try another one.')]
+
+        return name
diff --git a/subjects/forms.py b/subjects/forms.py
index 4f3b1f2..a33f62d 100644
--- a/subjects/forms.py
+++ b/subjects/forms.py
@@ -71,6 +71,19 @@ class CreateSubjectForm(forms.ModelForm):
             return ValueError"""
         return cleaned_data
     
+    def clean_name(self):
+        name = self.cleaned_data.get('name')
+        if self.instance.id:
+            same_name = Subject.objects.filter(name__unaccent__iexact = name).exclude(id = self.instance.id)
+        else:
+            same_name = Subject.objects.filter(name__unaccent__iexact = name)
+
+        if same_name.count() > 0:
+            self._errors['name'] = [_('There is another subject with this name, try another one.')]
+
+
+        return name
+
     def clean_subscribe_begin(self):
         subscribe_begin = self.cleaned_data['subscribe_begin']
         
diff --git a/subjects/views.py b/subjects/views.py
index 60659be..7c34ac7 100644
--- a/subjects/views.py
+++ b/subjects/views.py
@@ -179,7 +179,7 @@ class SubjectCreateView(LoginRequiredMixin, CreateView):
         user = request.user
         pk = user.pk 
         if kwargs.get('subject_slug'):
-            Subject.objects.filter((Q(professor__pk=pk) | Q(category__coordinators__pk=pk)) & Q(slug = kwargs.get('subject_slug')))
+            subject = Subject.objects.filter((Q(professor__pk=pk) | Q(category__coordinators__pk=pk)) & Q(slug = kwargs.get('subject_slug')))
             if not user.is_staff:
                 if subject.count() == 0:
                     if request.META.get('HTTP_REFERER'):
--
libgit2 0.21.2