diff --git a/app/dao/users_dao.py b/app/dao/users_dao.py
index 50113bbf6..89d20bc84 100644
--- a/app/dao/users_dao.py
+++ b/app/dao/users_dao.py
@@ -97,6 +97,10 @@ def get_user_by_email(email):
     return User.query.filter(func.lower(User.email_address) == func.lower(email)).one()
 
 
+def get_users_by_partial_email(email):
+    return User.query.filter(User.email_address.ilike("\%{}\%".format(email))).all()
+
+
 def increment_failed_login_count(user):
     user.failed_login_count += 1
     db.session.add(user)
diff --git a/app/schemas.py b/app/schemas.py
index 31b28c32a..de226f215 100644
--- a/app/schemas.py
+++ b/app/schemas.py
@@ -564,8 +564,14 @@ class EmailDataSchema(ma.Schema):
 
     email = fields.Str(required=True)
 
+    def __init__(self, partial_email=False):
+        super().__init__()
+        self.partial_email = partial_email
+
     @validates('email')
     def validate_email(self, value):
+        if self.partial_email:
+            return
         try:
             validate_email_address(value)
         except InvalidEmailError as e:
@@ -686,6 +692,7 @@ notification_with_personalisation_schema = NotificationWithPersonalisationSchema
 invited_user_schema = InvitedUserSchema()
 permission_schema = PermissionSchema()
 email_data_request_schema = EmailDataSchema()
+partial_email_data_request_schema = EmailDataSchema(partial_email=True)
 notifications_filter_schema = NotificationsFilterSchema()
 service_history_schema = ServiceHistorySchema()
 api_key_history_schema = ApiKeyHistorySchema()
diff --git a/app/user/rest.py b/app/user/rest.py
index 646c21239..cfce893a6 100644
--- a/app/user/rest.py
+++ b/app/user/rest.py
@@ -16,6 +16,7 @@ from app.dao.users_dao import (
     increment_failed_login_count,
     reset_failed_login_count,
     get_user_by_email,
+    get_users_by_partial_email,
     create_secret_code,
     save_user_attribute,
     update_user_password,
@@ -32,6 +33,7 @@ from app.notifications.process_notifications import (
 )
 from app.schemas import (
     email_data_request_schema,
+    partial_email_data_request_schema,
     create_user_schema,
     permission_schema,
     user_update_schema_load_json,
@@ -356,6 +358,14 @@ def get_by_email():
     return jsonify(data=result)
 
 
+@user_blueprint.route('/find-users-by-email', methods=['POST'])
+def find_users_by_email():
+    email, errors = partial_email_data_request_schema.load(request.get_json())
+    fetched_users = get_users_by_partial_email(email['email'])
+    result = [user.serialize() for user in fetched_users]
+    return jsonify(data=result), 200
+
+
 @user_blueprint.route('/reset-password', methods=['POST'])
 def send_user_reset_password():
     email, errors = email_data_request_schema.load(request.get_json())
diff --git a/tests/app/user/test_rest.py b/tests/app/user/test_rest.py
index fc4d9632d..1db989706 100644
--- a/tests/app/user/test_rest.py
+++ b/tests/app/user/test_rest.py
@@ -731,3 +731,71 @@ def test_get_orgs_and_services_only_shows_users_orgs_and_services(admin_request,
             }
         ]
     }
+
+
+def test_find_users_by_email_finds_user_by_partial_email(notify_db, client):
+    create_user(email='findel.mestro@foo.com')
+    create_user(email='me.ignorra@foo.com')
+    data = json.dumps({"email": "findel"})
+    auth_header = create_authorization_header()
+
+    response = client.post(
+        url_for("user.find_users_by_email"),
+        data=data,
+        headers=[('Content-Type', 'application/json'), auth_header]
+    )
+    users = json.loads(response.get_data(as_text=True))
+
+    assert response.status_code == 200
+    assert len(users['data']) == 1
+    assert users['data'][0]['email_address'] == 'findel.mestro@foo.com'
+
+
+def test_find_users_by_email_finds_user_by_full_email(notify_db, client):
+    create_user(email='findel.mestro@foo.com')
+    create_user(email='me.ignorra@foo.com')
+    data = json.dumps({"email": "findel.mestro@foo.com"})
+    auth_header = create_authorization_header()
+
+    response = client.post(
+        url_for("user.find_users_by_email"),
+        data=data,
+        headers=[('Content-Type', 'application/json'), auth_header]
+    )
+    users = json.loads(response.get_data(as_text=True))
+
+    assert response.status_code == 200
+    assert len(users['data']) == 1
+    assert users['data'][0]['email_address'] == 'findel.mestro@foo.com'
+
+
+def test_find_users_by_email_handles_no_results(notify_db, client):
+    create_user(email='findel.mestro@foo.com')
+    create_user(email='me.ignorra@foo.com')
+    data = json.dumps({"email": "rogue"})
+    auth_header = create_authorization_header()
+
+    response = client.post(
+        url_for("user.find_users_by_email"),
+        data=data,
+        headers=[('Content-Type', 'application/json'), auth_header]
+    )
+    users = json.loads(response.get_data(as_text=True))
+
+    assert response.status_code == 200
+    assert users['data'] == []
+
+
+def test_search_for_users_by_email_handles_incorrect_data_format(notify_db, client):
+    create_user(email='findel.mestro@foo.com')
+    data = json.dumps({"email": 1})
+    auth_header = create_authorization_header()
+
+    response = client.post(
+        url_for("user.find_users_by_email"),
+        data=data,
+        headers=[('Content-Type', 'application/json'), auth_header]
+    )
+
+    assert response.status_code == 400
+    assert json.loads(response.get_data(as_text=True))['message'] == {'email': ['Not a valid string.']}