diff --git a/app/__init__.py b/app/__init__.py
index cf4529634..fff052eb1 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -17,6 +17,7 @@ from app.notify_client.api_key_api_client import ApiKeyApiClient
 from app.notify_client.user_api_client import UserApiClient
 from app.notify_client.job_api_client import JobApiClient
 from app.notify_client.status_api_client import StatusApiClient
+from app.notify_client.invite_api_client import InviteApiClient
 from app.its_dangerous_session import ItsdangerousSessionInterface
 from app.asset_fingerprinter import AssetFingerprinter
 from app.utils import validate_phone_number, InvalidPhoneError
@@ -32,6 +33,7 @@ user_api_client = UserApiClient()
 api_key_api_client = ApiKeyApiClient()
 job_api_client = JobApiClient()
 status_api_client = StatusApiClient()
+invite_api_client = InviteApiClient()
 asset_fingerprinter = AssetFingerprinter()
 
 
@@ -49,6 +51,7 @@ def create_app(config_name, config_overrides=None):
     api_key_api_client.init_app(application)
     job_api_client.init_app(application)
     status_api_client.init_app(application)
+    invite_api_client.init_app(application)
 
     login_manager.init_app(application)
     login_manager.login_view = 'main.sign_in'
diff --git a/app/main/views/manage_users.py b/app/main/views/manage_users.py
index 0a9a2d067..2f425f6af 100644
--- a/app/main/views/manage_users.py
+++ b/app/main/views/manage_users.py
@@ -7,13 +7,18 @@ from flask import (
     flash
 )
 
-from flask_login import login_required, current_user
+from flask_login import (
+    login_required,
+    current_user
+)
+
+from notifications_python_client.errors import HTTPError
 
 from app.main import main
-from app.main.dao import users_dao
 from app.main.forms import InviteUserForm
 from app.main.dao.services_dao import get_service_by_id_or_404
 from app import user_api_client
+from app import invite_api_client
 
 fake_users = [
     {
@@ -44,10 +49,18 @@ def manage_users(service_id):
 def invite_user(service_id):
 
     form = InviteUserForm()
-
     if form.validate_on_submit():
-        flash('Invite sent to {}'.format(form.email_address.data), 'default_with_tick')
-        return redirect(url_for('.manage_users', service_id=service_id))
+        email_address = form.email_address.data
+        try:
+            resp = invite_api_client.create_invite(current_user.id, service_id, email_address)
+            flash('Invite sent to {}'.format(resp['email_address']), 'default_with_tick')
+            return redirect(url_for('.manage_users', service_id=service_id))
+
+        except HTTPError as e:
+            if e.status_code == 404:
+                abort(404)
+            else:
+                raise e
 
     return render_template(
         'views/invite-user.html',
diff --git a/app/notify_client/invite_api_client.py b/app/notify_client/invite_api_client.py
new file mode 100644
index 000000000..e3a7e3ee3
--- /dev/null
+++ b/app/notify_client/invite_api_client.py
@@ -0,0 +1,23 @@
+
+from notifications_python_client.base import BaseAPIClient
+
+
+class InviteApiClient(BaseAPIClient):
+    def __init__(self, base_url=None, client_id=None, secret=None):
+        super(self.__class__, self).__init__(base_url=base_url or 'base_url',
+                                             client_id=client_id or 'client_id',
+                                             secret=secret or 'secret')
+
+    def init_app(self, app):
+        self.base_url = app.config['API_HOST_NAME']
+        self.client_id = app.config['ADMIN_CLIENT_USER_NAME']
+        self.secret = app.config['ADMIN_CLIENT_SECRET']
+
+    def create_invite(self, invite_from_id, service_id, email_address):
+        data = {
+            'service': str(service_id),
+            'email_address': email_address,
+            'from_user': invite_from_id
+        }
+        resp = self.post(url='/service/{}/invite'.format(service_id), data=data)
+        return resp['data']
diff --git a/tests/app/main/views/test_manage_users.py b/tests/app/main/views/test_manage_users.py
index de146a148..bdd31ca70 100644
--- a/tests/app/main/views/test_manage_users.py
+++ b/tests/app/main/views/test_manage_users.py
@@ -70,19 +70,25 @@ def test_should_show_page_for_inviting_user(
 
 def test_invite_user(
     app_,
+    service_one,
     api_user_active,
     mock_login,
-    mock_get_service,
-    mock_get_users_by_service
+    mock_get_users_by_service,
+    mock_create_invite
 ):
+    from_user = api_user_active.id
+    service_id = service_one['id']
+    email_address = 'test@example.gov.uk'
+
     with app_.test_request_context():
         with app_.test_client() as client:
             client.login(api_user_active)
             response = client.post(
-                url_for('main.invite_user', service_id=55555),
-                data={'email_address': 'test@example.gov.uk'},
+                url_for('main.invite_user', service_id=service_id),
+                data={'email_address': email_address},
                 follow_redirects=True
             )
 
         assert response.status_code == 200
         assert 'Invite sent to test@example.gov.uk' in response.get_data(as_text=True)
+        mock_create_invite.assert_called_with(from_user, service_id, email_address)
diff --git a/tests/conftest.py b/tests/conftest.py
index b9622bf9e..b0735c0f2 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,4 +1,4 @@
-import os
+import uuid
 from datetime import date
 import pytest
 
@@ -533,3 +533,15 @@ def mock_s3_upload(mocker):
     def _upload(upload_id, service_id, filedata, region):
         pass
     return mocker.patch('app.main.views.send.s3upload', side_effect=_upload)
+
+
+@pytest.fixture(scope='function')
+def mock_create_invite(mocker):
+    def _create_invite(from_user, service_id, email_address):
+        data = {'id': uuid.uuid4(),
+                'from_user': from_user,
+                'service': service_id,
+                'email_address': email_address,
+                'status': 'pending'}
+        return data
+    return mocker.patch('app.invite_api_client.create_invite', side_effect=_create_invite)