diff --git a/targetApp/forms.py b/targetApp/forms.py
index 094d065d..7529f07c 100644
--- a/targetApp/forms.py
+++ b/targetApp/forms.py
@@ -23,6 +23,12 @@ class AddTargetForm(forms.Form):
             }
         ))
 
+    def clean_domain_name(self):
+        data = self.cleaned_data['domain_name']
+        if Domain.objects.filter(domain_name=data).count() > 0:
+            raise forms.ValidationError("{} target/domain already exists".format(data))
+        return data
+
 
 class UpdateTargetForm(forms.ModelForm):
     class Meta: