diff --git a/app/invite/rest.py b/app/invite/rest.py
index 99d4d56d2..1b9fb7454 100644
--- a/app/invite/rest.py
+++ b/app/invite/rest.py
@@ -13,8 +13,9 @@ from app.dao.invited_user_dao import (
     get_invited_users_for_service
 )
 from app.dao.templates_dao import dao_get_template_by_id
+from app.models import EMAIL_TYPE, KEY_TYPE_NORMAL
+from app.notifications.process_notifications import persist_notification, send_notification_to_queue
 from app.schemas import invited_user_schema
-from app.celery.tasks import (send_email)
 
 invite = Blueprint('invite', __name__, url_prefix='/service/<service_id>/invite')
 
@@ -29,22 +30,23 @@ def create_invited_user(service_id):
     save_invited_user(invited_user)
 
     template = dao_get_template_by_id(current_app.config['INVITATION_EMAIL_TEMPLATE_ID'])
-    message = {
-        'template': str(template.id),
-        'template_version': template.version,
-        'to': invited_user.email_address,
-        'personalisation': {
+
+    saved_notification = persist_notification(
+        template_id=template.id,
+        template_version=template.version,
+        recipient=invited_user.email_address,
+        service_id=current_app.config['NOTIFY_SERVICE_ID'],
+        personalisation={
             'user_name': invited_user.from_user.name,
             'service_name': invited_user.service.name,
             'url': invited_user_url(invited_user.id)
-        }
-    }
-    send_email.apply_async((
-        current_app.config['NOTIFY_SERVICE_ID'],
-        str(uuid.uuid4()),
-        encryption.encrypt(message),
-        datetime.utcnow().strftime(DATETIME_FORMAT)
-    ), queue="notify")
+        },
+        notification_type=EMAIL_TYPE,
+        api_key_id=None,
+        key_type=KEY_TYPE_NORMAL
+    )
+
+    send_notification_to_queue(saved_notification, False, queue="notify")
 
     return jsonify(data=invited_user_schema.dump(invited_user).data), 201
 
diff --git a/tests/app/invite/test_invite_rest.py b/tests/app/invite/test_invite_rest.py
index f76296d8c..d55f5dadc 100644
--- a/tests/app/invite/test_invite_rest.py
+++ b/tests/app/invite/test_invite_rest.py
@@ -1,95 +1,70 @@
 import json
 import uuid
 
-from flask import current_app
-from freezegun import freeze_time
-
-from app import encryption
+from app.models import Notification
 from tests import create_authorization_header
-import app.celery.tasks
 
 
-@freeze_time("2016-01-01T11:09:00.061258")
-def test_create_invited_user(notify_api, sample_service, mocker, invitation_email_template):
-    with notify_api.test_request_context():
-        with notify_api.test_client() as client:
-            mocker.patch('uuid.uuid4', return_value='some_uuid')  # for the notification id
-            mocker.patch('app.celery.tasks.send_email.apply_async')
-            mocker.patch('notifications_utils.url_safe_token.generate_token', return_value='the-token')
-            email_address = 'invited_user@service.gov.uk'
-            invite_from = sample_service.users[0]
+def test_create_invited_user(client, sample_service, mocker, invitation_email_template):
+    mocked = mocker.patch('app.celery.provider_tasks.deliver_email.apply_async')
+    email_address = 'invited_user@service.gov.uk'
+    invite_from = sample_service.users[0]
 
-            data = {
-                'service': str(sample_service.id),
-                'email_address': email_address,
-                'from_user': str(invite_from.id),
-                'permissions': 'send_messages,manage_service,manage_api_keys'
-            }
-            auth_header = create_authorization_header()
+    data = {
+        'service': str(sample_service.id),
+        'email_address': email_address,
+        'from_user': str(invite_from.id),
+        'permissions': 'send_messages,manage_service,manage_api_keys'
+    }
+    auth_header = create_authorization_header()
 
-            response = client.post(
-                '/service/{}/invite'.format(sample_service.id),
-                headers=[('Content-Type', 'application/json'), auth_header],
-                data=json.dumps(data)
-            )
-            assert response.status_code == 201
-            json_resp = json.loads(response.get_data(as_text=True))
+    response = client.post(
+        '/service/{}/invite'.format(sample_service.id),
+        headers=[('Content-Type', 'application/json'), auth_header],
+        data=json.dumps(data)
+    )
+    assert response.status_code == 201
+    json_resp = json.loads(response.get_data(as_text=True))
 
-            assert json_resp['data']['service'] == str(sample_service.id)
-            assert json_resp['data']['email_address'] == email_address
-            assert json_resp['data']['from_user'] == str(invite_from.id)
-            assert json_resp['data']['permissions'] == 'send_messages,manage_service,manage_api_keys'
-            assert json_resp['data']['id']
+    assert json_resp['data']['service'] == str(sample_service.id)
+    assert json_resp['data']['email_address'] == email_address
+    assert json_resp['data']['from_user'] == str(invite_from.id)
+    assert json_resp['data']['permissions'] == 'send_messages,manage_service,manage_api_keys'
+    assert json_resp['data']['id']
 
-            message = {
-                'template': str(invitation_email_template.id),
-                'template_version': invitation_email_template.version,
-                'to': email_address,
-                'personalisation': {
-                    'user_name': invite_from.name,
-                    'service_name': sample_service.name,
-                    'url': '{0}/invitation/{1}'.format(current_app.config['ADMIN_BASE_URL'], 'the-token')
-                }
-            }
-            app.celery.tasks.send_email.apply_async.assert_called_once_with(
-                (str(current_app.config['NOTIFY_SERVICE_ID']),
-                 'some_uuid',
-                 encryption.encrypt(message),
-                 "2016-01-01T11:09:00.061258Z"),
-                queue="notify")
+    notification = Notification.query.first()
+    mocked.assert_called_once_with([(str(notification.id))], queue="notify")
 
 
-def test_create_invited_user_invalid_email(notify_api, sample_service, mocker):
-    with notify_api.test_request_context():
-        with notify_api.test_client() as client:
-            mocker.patch('app.celery.tasks.send_email.apply_async')
-            email_address = 'notanemail'
-            invite_from = sample_service.users[0]
+def test_create_invited_user_invalid_email(client, sample_service, mocker):
+    mocked = mocker.patch('app.celery.provider_tasks.deliver_email.apply_async')
+    email_address = 'notanemail'
+    invite_from = sample_service.users[0]
 
-            data = {
-                'service': str(sample_service.id),
-                'email_address': email_address,
-                'from_user': str(invite_from.id),
-                'permissions': 'send_messages,manage_service,manage_api_keys'
-            }
+    data = {
+        'service': str(sample_service.id),
+        'email_address': email_address,
+        'from_user': str(invite_from.id),
+        'permissions': 'send_messages,manage_service,manage_api_keys'
+    }
 
-            data = json.dumps(data)
+    data = json.dumps(data)
 
-            auth_header = create_authorization_header()
+    auth_header = create_authorization_header()
 
-            response = client.post(
-                '/service/{}/invite'.format(sample_service.id),
-                headers=[('Content-Type', 'application/json'), auth_header],
-                data=data
-            )
-            assert response.status_code == 400
-            json_resp = json.loads(response.get_data(as_text=True))
-            assert json_resp['result'] == 'error'
-            assert json_resp['message'] == {'email_address': ['Not a valid email address.']}
-            app.celery.tasks.send_email.apply_async.assert_not_called()
+    response = client.post(
+        '/service/{}/invite'.format(sample_service.id),
+        headers=[('Content-Type', 'application/json'), auth_header],
+        data=data
+    )
+    assert response.status_code == 400
+    json_resp = json.loads(response.get_data(as_text=True))
+    assert json_resp['result'] == 'error'
+    assert json_resp['message'] == {'email_address': ['Not a valid email address.']}
+    assert mocked.call_count == 0
 
 
-def test_get_all_invited_users_by_service(notify_api, notify_db, notify_db_session, sample_service):
+def test_get_all_invited_users_by_service(client, notify_db, notify_db_session, sample_service):
 
     from tests.app.conftest import sample_invited_user
     invites = []
@@ -102,120 +77,101 @@ def test_get_all_invited_users_by_service(notify_api, notify_db, notify_db_sessi
                                            email)
         invites.append(invited_user)
 
-    with notify_api.test_request_context():
-        with notify_api.test_client() as client:
+    url = '/service/{}/invite'.format(sample_service.id)
 
-            url = '/service/{}/invite'.format(sample_service.id)
+    auth_header = create_authorization_header()
 
-            auth_header = create_authorization_header()
+    response = client.get(
+        url,
+        headers=[('Content-Type', 'application/json'), auth_header]
+    )
+    assert response.status_code == 200
+    json_resp = json.loads(response.get_data(as_text=True))
 
-            response = client.get(
-                url,
-                headers=[('Content-Type', 'application/json'), auth_header]
-            )
-            assert response.status_code == 200
-            json_resp = json.loads(response.get_data(as_text=True))
+    invite_from = sample_service.users[0]
 
-            invite_from = sample_service.users[0]
-
-            for invite in json_resp['data']:
-                assert invite['service'] == str(sample_service.id)
-                assert invite['from_user'] == str(invite_from.id)
-                assert invite['id']
+    for invite in json_resp['data']:
+        assert invite['service'] == str(sample_service.id)
+        assert invite['from_user'] == str(invite_from.id)
+        assert invite['id']
 
 
-def test_get_invited_users_by_service_with_no_invites(notify_api, notify_db, notify_db_session, sample_service):
+def test_get_invited_users_by_service_with_no_invites(client, notify_db, notify_db_session, sample_service):
+    url = '/service/{}/invite'.format(sample_service.id)
 
-    with notify_api.test_request_context():
-        with notify_api.test_client() as client:
+    auth_header = create_authorization_header()
 
-            url = '/service/{}/invite'.format(sample_service.id)
-
-            auth_header = create_authorization_header()
-
-            response = client.get(
-                url,
-                headers=[('Content-Type', 'application/json'), auth_header]
-            )
-            assert response.status_code == 200
-            json_resp = json.loads(response.get_data(as_text=True))
-            assert len(json_resp['data']) == 0
+    response = client.get(
+        url,
+        headers=[('Content-Type', 'application/json'), auth_header]
+    )
+    assert response.status_code == 200
+    json_resp = json.loads(response.get_data(as_text=True))
+    assert len(json_resp['data']) == 0
 
 
-def test_get_invited_user_by_service_and_id(notify_api, sample_service, sample_invited_user):
-    with notify_api.test_request_context():
-        with notify_api.test_client() as client:
+def test_get_invited_user_by_service_and_id(client, sample_service, sample_invited_user):
+    url = '/service/{}/invite/{}'.format(sample_service.id, sample_invited_user.id)
 
-            url = '/service/{}/invite/{}'.format(sample_service.id, sample_invited_user.id)
+    auth_header = create_authorization_header()
 
-            auth_header = create_authorization_header()
+    response = client.get(
+        url,
+        headers=[('Content-Type', 'application/json'), auth_header]
+    )
+    assert response.status_code == 200
+    json_resp = json.loads(response.get_data(as_text=True))
 
-            response = client.get(
-                url,
-                headers=[('Content-Type', 'application/json'), auth_header]
-            )
-            assert response.status_code == 200
-            json_resp = json.loads(response.get_data(as_text=True))
+    invite_email_address = sample_invited_user.email_address
+    invite_from = sample_service.users[0]
 
-            invite_email_address = sample_invited_user.email_address
-            invite_from = sample_service.users[0]
-
-            assert json_resp['data']['service'] == str(sample_service.id)
-            assert json_resp['data']['email_address'] == invite_email_address
-            assert json_resp['data']['from_user'] == str(invite_from.id)
-            assert json_resp['data']['id']
+    assert json_resp['data']['service'] == str(sample_service.id)
+    assert json_resp['data']['email_address'] == invite_email_address
+    assert json_resp['data']['from_user'] == str(invite_from.id)
+    assert json_resp['data']['id']
 
 
-def test_get_invited_user_by_service_but_unknown_invite_id_returns_404(notify_api, sample_service):
-    with notify_api.test_request_context():
-        with notify_api.test_client() as client:
-            unknown_id = uuid.uuid4()
-            url = '/service/{}/invite/{}'.format(sample_service.id, unknown_id)
+def test_get_invited_user_by_service_but_unknown_invite_id_returns_404(client, sample_service):
+    unknown_id = uuid.uuid4()
+    url = '/service/{}/invite/{}'.format(sample_service.id, unknown_id)
 
-            auth_header = create_authorization_header()
+    auth_header = create_authorization_header()
 
-            response = client.get(
-                url,
-                headers=[('Content-Type', 'application/json'), auth_header]
-            )
-            assert response.status_code == 404
+    response = client.get(
+        url,
+        headers=[('Content-Type', 'application/json'), auth_header]
+    )
+    assert response.status_code == 404
 
 
-def test_update_invited_user_set_status_to_cancelled(notify_api, sample_invited_user):
-    with notify_api.test_request_context():
-        with notify_api.test_client() as client:
+def test_update_invited_user_set_status_to_cancelled(client, sample_invited_user):
+    data = {'status': 'cancelled'}
+    url = '/service/{0}/invite/{1}'.format(sample_invited_user.service_id, sample_invited_user.id)
+    auth_header = create_authorization_header()
+    response = client.post(url,
+                           data=json.dumps(data),
+                           headers=[('Content-Type', 'application/json'), auth_header])
 
-            data = {'status': 'cancelled'}
-            url = '/service/{0}/invite/{1}'.format(sample_invited_user.service_id, sample_invited_user.id)
-            auth_header = create_authorization_header()
-            response = client.post(url,
-                                   data=json.dumps(data),
-                                   headers=[('Content-Type', 'application/json'), auth_header])
-
-            assert response.status_code == 200
-            json_resp = json.loads(response.get_data(as_text=True))['data']
-            assert json_resp['status'] == 'cancelled'
+    assert response.status_code == 200
+    json_resp = json.loads(response.get_data(as_text=True))['data']
+    assert json_resp['status'] == 'cancelled'
 
 
-def test_update_invited_user_for_wrong_service_returns_404(notify_api, sample_invited_user, fake_uuid):
-    with notify_api.test_request_context():
-        with notify_api.test_client() as client:
-            data = {'status': 'cancelled'}
-            url = '/service/{0}/invite/{1}'.format(fake_uuid, sample_invited_user.id)
-            auth_header = create_authorization_header()
-            response = client.post(url, data=json.dumps(data),
-                                   headers=[('Content-Type', 'application/json'), auth_header])
-            assert response.status_code == 404
-            json_response = json.loads(response.get_data(as_text=True))['message']
-            assert json_response == 'No result found'
+def test_update_invited_user_for_wrong_service_returns_404(client, sample_invited_user, fake_uuid):
+    data = {'status': 'cancelled'}
+    url = '/service/{0}/invite/{1}'.format(fake_uuid, sample_invited_user.id)
+    auth_header = create_authorization_header()
+    response = client.post(url, data=json.dumps(data),
+                           headers=[('Content-Type', 'application/json'), auth_header])
+    assert response.status_code == 404
+    json_response = json.loads(response.get_data(as_text=True))['message']
+    assert json_response == 'No result found'
 
 
-def test_update_invited_user_for_invalid_data_returns_400(notify_api, sample_invited_user):
-    with notify_api.test_request_context():
-        with notify_api.test_client() as client:
-            data = {'status': 'garbage'}
-            url = '/service/{0}/invite/{1}'.format(sample_invited_user.service_id, sample_invited_user.id)
-            auth_header = create_authorization_header()
-            response = client.post(url, data=json.dumps(data),
-                                   headers=[('Content-Type', 'application/json'), auth_header])
-            assert response.status_code == 400
+def test_update_invited_user_for_invalid_data_returns_400(client, sample_invited_user):
+    data = {'status': 'garbage'}
+    url = '/service/{0}/invite/{1}'.format(sample_invited_user.service_id, sample_invited_user.id)
+    auth_header = create_authorization_header()
+    response = client.post(url, data=json.dumps(data),
+                           headers=[('Content-Type', 'application/json'), auth_header])
+    assert response.status_code == 400