diff --git a/src/accounts/forms.py b/src/accounts/forms.py
index 8dd67f3..51ccb14 100644
--- a/src/accounts/forms.py
+++ b/src/accounts/forms.py
@@ -5,11 +5,24 @@ from django.contrib.auth import get_user_model
 from django.utils.translation import ugettext_lazy as _
 
 from super_archives.models import MailingList
-
+from .utils.validators import validate_social_account
 
 User = get_user_model()
 
 
+class SocialAccountField(forms.Field):
+    def __init__(self, *args, **kwargs):
+        self.url = kwargs.pop('url', None)
+        super(SocialAccountField, self).__init__(*args, **kwargs)
+
+    def validate(self, value):
+        super(SocialAccountField, self).validate(value)
+
+        if value and not validate_social_account(value, self.url):
+            raise forms.ValidationError(_('Social account does not exist'),
+                                        code='social-account-doesnot-exist')
+
+
 class UserForm(forms.ModelForm):
     required = ('first_name', 'last_name', 'email', 'username')
 
@@ -34,12 +47,16 @@ class UserCreationForm(UserForm):
 
 
 class UserUpdateForm(UserForm):
+
     class Meta:
         model = User
         fields = ('username', 'first_name', 'last_name',
                   'institution', 'role', 'twitter', 'facebook',
                   'google_talk', 'webpage')
 
+    twitter = SocialAccountField(url='https://twitter.com/', required=False)
+    facebook = SocialAccountField(url='https://graph.facebook.com/', required=False)
+
 
 class ListsForm(forms.Form):
     LISTS_NAMES = ((list.name, list.name) for list in MailingList.objects.all())
diff --git a/src/accounts/utils/__init__.py b/src/accounts/utils/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/src/accounts/utils/__init__.py
diff --git a/src/accounts/utils/validators.py b/src/accounts/utils/validators.py
new file mode 100644
index 0000000..68f4128
--- /dev/null
+++ b/src/accounts/utils/validators.py
@@ -0,0 +1,26 @@
+
+import urllib2
+import urlparse
+
+
+def validate_social_account(account, url):
+    """Verifies if a social account is valid.
+
+    Examples:
+
+    >>> validate_social_account('seocam', 'http://twitter.com')
+    True
+
+    >>> validate_social_account('seocam-fake-should-fail', 'http://twitter.com')
+    False
+    """
+
+    request = urllib2.Request(urlparse.urljoin(url, account))
+    request.get_method = lambda: 'HEAD'
+
+    try:
+        response = urllib2.urlopen(request)
+    except urllib2.HTTPError:
+        return False
+
+    return response.code == 200
--
libgit2 0.21.2