diff --git a/doc/source/reference/using.rst b/doc/source/reference/using.rst
index b2aaf24314..5f43dfa893 100644
--- a/doc/source/reference/using.rst
+++ b/doc/source/reference/using.rst
@@ -608,6 +608,18 @@ To set the pre-release group membership:
 
   tox -e aclmanager -- groups pre_release ttx
 
+tools/check_approval.py
+-----------------------
+
+A script to test that release requests have been approved by a team
+liaison.
+
+Example:
+
+::
+
+  tox -e check_approval -- 695375
+
 tools/membership_freeze_test.py
 --------------------------------
 
diff --git a/tools/check_approval.py b/tools/check_approval.py
new file mode 100755
index 0000000000..39d66a475c
--- /dev/null
+++ b/tools/check_approval.py
@@ -0,0 +1,145 @@
+#!/usr/bin/python3
+#
+# Check PTL/liaison has approved release
+#
+# Copyright 2019 Thierry Carrez <thierry@openstack.org>
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import argparse
+import json
+import logging
+import os
+import sys
+
+from openstack_governance import governance
+import requests
+from requests.packages import urllib3
+import yaml
+
+
+GERRIT_URL = 'https://review.opendev.org/'
+LOG = logging.getLogger(__name__)
+
+# Turn of warnings about bad SSL config.
+# https://urllib3.readthedocs.io/en/latest/advanced-usage.html#ssl-warnings
+urllib3.disable_warnings()
+
+
+def get_team(deliverablefile):
+    with open(deliverablefile, 'r') as dfile:
+        team = yaml.safe_load(dfile)['team']
+    return team
+
+
+def get_liaisons(team):
+    with open('data/release_liaisons.yaml', 'r') as lfile:
+        liaisons = yaml.safe_load(lfile)
+    if team in liaisons:
+        return [i['email'] for i in liaisons[team]]
+    else:
+        print('WARNING: %s team does not exist in liaisons file' % team)
+        return []
+
+
+class GerritChange(object):
+
+    def __init__(self, gov_data, changeid):
+        # Load governance data
+        self.gov_data = governance.Governance.from_remote_repo()
+
+        # Grab changeid details from Gerrit
+        call = 'changes/%s' % changeid + \
+               '?o=CURRENT_REVISION&o=CURRENT_FILES&o=DETAILED_LABELS' + \
+               '&o=DETAILED_ACCOUNTS'
+        raw = requests.get(GERRIT_URL + call)
+
+        # Gerrit's REST API prepends a JSON-breaker to avoid XSS
+        if raw.text.startswith(")]}'"):
+            trimmed = raw.text[4:]
+        else:
+            trimmed = raw.text
+
+        # Try to decode and bail with much detail if it fails
+        try:
+            decoded = json.loads(trimmed)
+        except Exception:
+            LOG.error(
+                '\nrequest returned %s error to query:\n\n    %s\n'
+                '\nwith detail:\n\n    %s\n',
+                raw, raw.url, trimmed)
+            raise
+
+        # Instantiate object with retrieved data
+        self.raw_data = decoded
+        self.approvers = [i['email']
+                          for i in decoded['labels']['Code-Review']['all']
+                          if i['value'] > 0]
+        self.approvers.append(decoded['owner']['email'])
+        currev = decoded['current_revision']
+        self.deliv_files = list(decoded['revisions'][currev]['files'].keys())
+
+    def is_approved(self):
+        LOG.debug('Approvals: %s' % self.approvers)
+        approved = True
+        for deliv_file in self.deliv_files:
+            team = get_team(deliv_file)
+            try:
+                govteam = self.gov_data.get_team(team)
+            except ValueError:
+                print('✕ %s mentions unknown team %s' % (deliv_file, team))
+                approved = False
+                break
+
+            # Check that deliverable is indeed defined in governance team
+            delivname, _ = os.path.splitext(os.path.basename(deliv_file))
+            if delivname not in govteam.deliverables:
+                print('✕ %s not in %s governance' % (deliv_file, team))
+                approved = False
+                break
+
+            # Fetch PTL and release liaisons
+            liaisons = get_liaisons(team)
+            if 'email' in govteam.ptl:
+                liaisons.append(govteam.ptl['email'])
+            LOG.debug('%s needs %s' % (deliv_file, liaisons))
+
+            for approver in self.approvers:
+                if approver in liaisons:
+                    print('✓ %s validated by %s' % (deliv_file, approver))
+                    break
+            else:
+                print('✕ %s missing PTL/liaison approval' % deliv_file)
+                approved = False
+        return approved
+
+
+def main(args=sys.argv[1:]):
+    parser = argparse.ArgumentParser()
+    parser.add_argument('changeid')
+    parser.add_argument("--debug", action='store_true')
+    args = parser.parse_args(args)
+
+    if (args.debug):
+        logging.basicConfig(level=logging.DEBUG)
+
+    gov_data = governance.Governance.from_remote_repo()
+    change = GerritChange(gov_data, args.changeid)
+
+    if not change.is_approved():
+        sys.exit(1)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/tox.ini b/tox.ini
index ad841bb6ab..53a6566393 100644
--- a/tox.ini
+++ b/tox.ini
@@ -58,6 +58,9 @@ commands = bash -c "find {toxinidir}          \
 [testenv:aclmanager]
 commands = python {toxinidir}/tools/aclmanager.py {posargs}
 
+[testenv:check_approval]
+commands = python {toxinidir}/tools/check_approval.py {posargs}
+
 [testenv:membership_freeze_test]
 commands = python {toxinidir}/tools/membership_freeze_test.py {posargs}