diff --git a/acme/acme/client.py b/acme/acme/client.py
index 117ee6b7d..de7eef299 100644
--- a/acme/acme/client.py
+++ b/acme/acme/client.py
@@ -89,8 +89,6 @@ class Client(object):  # pylint: disable=too-many-instance-attributes
         :returns: Registration Resource.
         :rtype: `.RegistrationResource`
 
-        :raises .UnexpectedUpdate:
-
         """
         new_reg = messages.NewRegistration() if new_reg is None else new_reg
         assert isinstance(new_reg, messages.NewRegistration)
@@ -101,12 +99,7 @@ class Client(object):  # pylint: disable=too-many-instance-attributes
 
         # "Instance of 'Field' has no key/contact member" bug:
         # pylint: disable=no-member
-        regr = self._regr_from_response(response)
-        if (regr.body.key != self.key.public_key() or
-                regr.body.contact != new_reg.contact):
-            raise errors.UnexpectedUpdate(regr)
-
-        return regr
+        return self._regr_from_response(response)
 
     def _send_recv_regr(self, regr, body):
         response = self.net.post(regr.uri, body)
diff --git a/acme/acme/client_test.py b/acme/acme/client_test.py
index a526a0984..585576e2d 100644
--- a/acme/acme/client_test.py
+++ b/acme/acme/client_test.py
@@ -102,12 +102,6 @@ class ClientTest(unittest.TestCase):
         self.assertEqual(self.regr, self.client.register(self.new_reg))
         # TODO: test POST call arguments
 
-        # TODO: split here and separate test
-        reg_wrong_key = self.regr.body.update(key=KEY2.public_key())
-        self.response.json.return_value = reg_wrong_key.to_json()
-        self.assertRaises(
-            errors.UnexpectedUpdate, self.client.register, self.new_reg)
-
     def test_register_missing_next(self):
         self.response.status_code = http_client.CREATED
         self.assertRaises(