diff --git a/.gitignore b/.gitignore
index ac2842e27..b63e40d1c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -33,3 +33,5 @@ tags
 tests/letstest/letest-*/
 tests/letstest/*.pem
 tests/letstest/venv/
+
+.venv
diff --git a/acme/acme/client.py b/acme/acme/client.py
index 26109352b..19f566b0d 100644
--- a/acme/acme/client.py
+++ b/acme/acme/client.py
@@ -132,12 +132,24 @@ class Client(object):  # pylint: disable=too-many-instance-attributes
 
         """
         update = regr.body if update is None else update
-        updated_regr = self._send_recv_regr(
-            regr, body=messages.UpdateRegistration(**dict(update)))
+        body = messages.UpdateRegistration(**dict(update))
+        updated_regr = self._send_recv_regr(regr, body=body)
         if updated_regr != regr:
             raise errors.UnexpectedUpdate(regr)
         return updated_regr
 
+    def deactivate_registration(self, regr):
+        """Deactivate registration.
+
+        :param messages.RegistrationResource regr: The Registration Resource
+            to be deactivated.
+
+        :returns: The Registration resource that was deactivated.
+        :rtype: `.RegistrationResource`
+
+        """
+        return self.update_registration(regr, update={'status': 'deactivated'})
+
     def query_registration(self, regr):
         """Query server about registration.
 
diff --git a/acme/acme/client_test.py b/acme/acme/client_test.py
index 4822a1ae6..62555939c 100644
--- a/acme/acme/client_test.py
+++ b/acme/acme/client_test.py
@@ -124,6 +124,20 @@ class ClientTest(unittest.TestCase):
         self.assertRaises(
             errors.UnexpectedUpdate, self.client.update_registration, self.regr)
 
+    def test_deactivate_account(self):
+        self.response.headers['Location'] = self.regr.uri
+        self.response.json.return_value = self.regr.body.to_json()
+        self.assertEqual(self.regr,
+                         self.client.deactivate_registration(self.regr))
+
+    def test_deactivate_account_bad_registration_returned(self):
+        self.response.headers['Location'] = self.regr.uri
+        self.response.json.return_value = "some wrong registration thing"
+        self.assertRaises(
+            errors.UnexpectedUpdate,
+            self.client.deactivate_registration,
+            self.regr)
+
     def test_query_registration(self):
         self.response.json.return_value = self.regr.body.to_json()
         self.assertEqual(self.regr, self.client.query_registration(self.regr))
diff --git a/acme/acme/messages.py b/acme/acme/messages.py
index 29d719684..54cd25c94 100644
--- a/acme/acme/messages.py
+++ b/acme/acme/messages.py
@@ -250,6 +250,7 @@ class Registration(ResourceBody):
     agreement = jose.Field('agreement', omitempty=True)
     authorizations = jose.Field('authorizations', omitempty=True)
     certificates = jose.Field('certificates', omitempty=True)
+    status = jose.Field('status', omitempty=True)
 
     class Authorizations(jose.JSONObjectWithFields):
         """Authorizations granted to Account in the process of registration.
diff --git a/certbot/account.py b/certbot/account.py
index 71951d8e0..877b87015 100644
--- a/certbot/account.py
+++ b/certbot/account.py
@@ -3,6 +3,7 @@ import datetime
 import hashlib
 import logging
 import os
+import shutil
 import socket
 
 from cryptography.hazmat.primitives import serialization
@@ -197,6 +198,18 @@ class AccountFileStorage(interfaces.AccountStorage):
         """
         self._save(account, regr_only=True)
 
+    def delete(self, account_id):
+        """Delete registration info from disk
+
+        :param account_id: id of account which should be deleted
+
+        """
+        account_dir_path = self._account_dir_path(account_id)
+        if not os.path.isdir(account_dir_path):
+            raise errors.AccountNotFound(
+                "Account at %s does not exist" % account_dir_path)
+        shutil.rmtree(account_dir_path)
+
     def _save(self, account, regr_only):
         account_dir_path = self._account_dir_path(account.id)
         util.make_or_verify_dir(account_dir_path, 0o700, os.geteuid(),
diff --git a/certbot/cli.py b/certbot/cli.py
index 4aeac6d34..7d146e33b 100644
--- a/certbot/cli.py
+++ b/certbot/cli.py
@@ -366,6 +366,10 @@ VERB_HELP = [
         "short": "Register for account with Let's Encrypt / other ACME server",
         "opts": "Options for account registration & modification"
     }),
+    ("unregister", {
+        "short": "Irrevocably deactivate your account",
+        "opts": "Options for account deactivation."
+    }),
     ("install", {
         "short": "Install an arbitrary cert in a server",
         "opts": "Options for modifying how a cert is deployed"
@@ -414,6 +418,7 @@ class HelpfulArgumentParser(object):
             "install": main.install,
             "plugins": main.plugins_cmd,
             "register": main.register,
+            "unregister": main.unregister,
             "renew": main.renew,
             "revoke": main.revoke,
             "rollback": main.rollback,
@@ -871,7 +876,9 @@ def prepare_and_parse_args(plugins, args, detect_defaults=False):  # pylint: dis
         help="With the register verb, indicates that details associated "
              "with an existing registration, such as the e-mail address, "
              "should be updated, rather than registering a new account.")
-    helpful.add(["register", "automation"], "-m", "--email", help=config_help("email"))
+    helpful.add(
+        ["register", "unregister", "automation"], "-m", "--email",
+        help=config_help("email"))
     helpful.add(
         ["automation", "certonly", "run"],
         "--keep-until-expiring", "--keep", "--reinstall",
@@ -913,7 +920,7 @@ def prepare_and_parse_args(plugins, args, detect_defaults=False):  # pylint: dis
         "automation", "--agree-tos", dest="tos", action="store_true",
         help="Agree to the ACME Subscriber Agreement (default: Ask)")
     helpful.add(
-        "automation", "--account", metavar="ACCOUNT_ID",
+        ["unregister", "automation"], "--account", metavar="ACCOUNT_ID",
         help="Account ID to use")
     helpful.add(
         "automation", "--duplicate", dest="duplicate", action="store_true",
diff --git a/certbot/client.py b/certbot/client.py
index b40a169e6..f76688b70 100644
--- a/certbot/client.py
+++ b/certbot/client.py
@@ -172,7 +172,7 @@ def perform_registration(acme, config):
 
 
 class Client(object):
-    """ACME protocol client.
+    """Certbot's client.
 
     :ivar .IConfig config: Client configuration.
     :ivar .Account account: Account registered with `register`.
diff --git a/certbot/main.py b/certbot/main.py
index b95049284..f8cb411b5 100644
--- a/certbot/main.py
+++ b/certbot/main.py
@@ -406,6 +406,35 @@ def _init_le_client(config, authenticator, installer):
     return client.Client(config, acc, authenticator, installer, acme=acme)
 
 
+def unregister(config, unused_plugins):
+    """Deactivate account on server"""
+    account_storage = account.AccountFileStorage(config)
+    accounts = account_storage.find_all()
+    reporter_util = zope.component.getUtility(interfaces.IReporter)
+
+    if not accounts:
+        return "Could not find existing account to deactivate."
+    yesno = zope.component.getUtility(interfaces.IDisplay).yesno
+    prompt = ("Are you sure you would like to irrevocably deactivate "
+              "your account?")
+    wants_deactivate = yesno(prompt, yes_label='Deactivate', no_label='Abort',
+                             default=True)
+
+    if not wants_deactivate:
+        return "Deactivation aborted."
+
+    acc, acme = _determine_account(config)
+    acme_client = client.Client(config, acc, None, None, acme=acme)
+
+    # delete on boulder
+    acme_client.acme.deactivate_registration(acc.regr)
+    account_files = account.AccountFileStorage(config)
+    # delete local account files
+    account_files.delete(config.account)
+
+    reporter_util.add_message("Account deactivated.", reporter_util.MEDIUM_PRIORITY)
+
+
 def register(config, unused_plugins):
     """Create or modify accounts on the server."""
 
@@ -413,6 +442,8 @@ def register(config, unused_plugins):
     # exist or not.
     account_storage = account.AccountFileStorage(config)
     accounts = account_storage.find_all()
+    reporter_util = zope.component.getUtility(interfaces.IReporter)
+    add_msg = lambda m: reporter_util.add_message(m, reporter_util.MEDIUM_PRIORITY)
 
     # registering a new account
     if not config.update_registration:
@@ -443,9 +474,7 @@ def register(config, unused_plugins):
     acc.regr = acme_client.acme.update_registration(acc.regr.update(
         body=acc.regr.body.update(contact=('mailto:' + config.email,))))
     account_storage.save_regr(acc)
-    reporter_util = zope.component.getUtility(interfaces.IReporter)
-    msg = "Your e-mail address was updated to {0}.".format(config.email)
-    reporter_util.add_message(msg, reporter_util.MEDIUM_PRIORITY)
+    add_msg("Your e-mail address was updated to {0}.".format(config.email))
 
 
 def install(config, plugins):
diff --git a/certbot/tests/account_test.py b/certbot/tests/account_test.py
index 1c50025d7..d045afe23 100644
--- a/certbot/tests/account_test.py
+++ b/certbot/tests/account_test.py
@@ -190,6 +190,14 @@ class AccountFileStorageTest(unittest.TestCase):
             self.assertRaises(
                 errors.AccountStorageError, self.storage.save, self.acc)
 
+    def test_delete(self):
+        self.storage.save(self.acc)
+        self.storage.delete(self.acc.id)
+        self.assertRaises(errors.AccountNotFound, self.storage.load, self.acc.id)
+
+    def test_delete_no_account(self):
+        self.assertRaises(errors.AccountNotFound, self.storage.delete, self.acc.id)
+
 
 if __name__ == "__main__":
     unittest.main()  # pragma: no cover
diff --git a/certbot/tests/main_test.py b/certbot/tests/main_test.py
index 087a3615d..3348a7574 100644
--- a/certbot/tests/main_test.py
+++ b/certbot/tests/main_test.py
@@ -1,4 +1,5 @@
 """Tests for certbot.main."""
+# pylint: disable=too-many-lines
 from __future__ import print_function
 
 import itertools
@@ -1164,6 +1165,68 @@ class MainTest(unittest.TestCase):  # pylint: disable=too-many-public-methods
                             email in mock_utility().add_message.call_args[0][0])
 
 
+class UnregisterTest(unittest.TestCase):
+    def setUp(self):
+        self.patchers = {
+            '_determine_account': mock.patch('certbot.main._determine_account'),
+            'account': mock.patch('certbot.main.account'),
+            'client': mock.patch('certbot.main.client'),
+            'get_utility': test_util.patch_get_utility()}
+        self.mocks = dict((k, v.start()) for k, v in self.patchers.items())
+
+    def tearDown(self):
+        for patch in self.patchers.values():
+            patch.stop()
+
+    def test_abort_unregister(self):
+        self.mocks['account'].AccountFileStorage.return_value = mock.Mock()
+
+        util_mock = self.mocks['get_utility'].return_value
+        util_mock.yesno.return_value = False
+
+        config = mock.Mock()
+        unused_plugins = mock.Mock()
+
+        res = main.unregister(config, unused_plugins)
+        self.assertEqual(res, "Deactivation aborted.")
+
+    def test_unregister(self):
+        mocked_storage = mock.MagicMock()
+        mocked_storage.find_all.return_value = ["an account"]
+
+        self.mocks['account'].AccountFileStorage.return_value = mocked_storage
+        self.mocks['_determine_account'].return_value = (mock.MagicMock(), "foo")
+
+        acme_client = mock.MagicMock()
+        self.mocks['client'].Client.return_value = acme_client
+
+        config = mock.MagicMock()
+        unused_plugins = mock.MagicMock()
+
+        res = main.unregister(config, unused_plugins)
+
+        self.assertTrue(res is None)
+        self.assertTrue(acme_client.acme.deactivate_registration.called)
+        m = "Account deactivated."
+        self.assertTrue(m in self.mocks['get_utility']().add_message.call_args[0][0])
+
+    def test_unregister_no_account(self):
+        mocked_storage = mock.MagicMock()
+        mocked_storage.find_all.return_value = []
+        self.mocks['account'].AccountFileStorage.return_value = mocked_storage
+
+        acme_client = mock.MagicMock()
+        self.mocks['client'].Client.return_value = acme_client
+
+        config = mock.MagicMock()
+        unused_plugins = mock.MagicMock()
+
+        res = main.unregister(config, unused_plugins)
+        m = "Could not find existing account to deactivate."
+        self.assertEqual(res, m)
+        self.assertFalse(acme_client.acme.deactivate_registration.called)
+
+
 class TestHandleException(unittest.TestCase):
     """Test main._handle_exception"""
     @mock.patch('certbot.main.sys')
diff --git a/tests/boulder-integration.sh b/tests/boulder-integration.sh
index 30fc17f81..790e5a263 100755
--- a/tests/boulder-integration.sh
+++ b/tests/boulder-integration.sh
@@ -9,7 +9,7 @@
 # Note: this script is called by Boulder integration test suite!
 
 . ./tests/integration/_common.sh
-export PATH="/usr/sbin:$PATH"  # /usr/sbin/nginx
+export PATH="$PATH:/usr/sbin"  # /usr/sbin/nginx
 
 export GOPATH="${GOPATH:-/tmp/go}"
 export PATH="$GOPATH/bin:$PATH"
@@ -161,7 +161,8 @@ common revoke --cert-path "$root/conf/live/le.wtf/cert.pem"
 common revoke --cert-path "$root/conf/live/le1.wtf/cert.pem"
 # revoke by cert key
 common revoke --cert-path "$root/conf/live/le2.wtf/cert.pem" \
-       --key-path "$root/conf/live/le2.wtf/privkey.pem"
+    --key-path "$root/conf/live/le2.wtf/privkey.pem"
+
 # Get new certs to test revoke with a reason, by account and by cert key
 common --domains le1.wtf
 common revoke --cert-path "$root/conf/live/le1.wtf/cert.pem" \
@@ -170,6 +171,9 @@ common --domains le2.wtf
 common revoke --cert-path "$root/conf/live/le2.wtf/cert.pem" \
     --key-path "$root/conf/live/le2.wtf/privkey.pem" \
     --reason keyCompromise
+
+common unregister
+
 if type nginx;
 then
     . ./certbot-nginx/tests/boulder-integration.sh