diff --git a/app/dao/invited_user_dao.py b/app/dao/invited_user_dao.py
index c5eb75918..c045489e8 100644
--- a/app/dao/invited_user_dao.py
+++ b/app/dao/invited_user_dao.py
@@ -1,7 +1,7 @@
 from datetime import datetime, timedelta
 
 from app import db
-from app.models import INVITE_EXPIRED, InvitedUser
+from app.models import INVITE_EXPIRED, INVITE_PENDING, InvitedUser
 
 
 def save_invited_user(invited_user):
@@ -31,7 +31,10 @@ def get_invited_users_for_service(service_id):
 def expire_invitations_created_more_than_two_days_ago():
     expired = (
         db.session.query(InvitedUser)
-        .filter(InvitedUser.created_at <= datetime.utcnow() - timedelta(days=2))
+        .filter(
+            InvitedUser.created_at <= datetime.utcnow() - timedelta(days=2),
+            InvitedUser.status.in_(INVITE_PENDING),
+        )
         .update({InvitedUser.status: INVITE_EXPIRED})
     )
     db.session.commit()
diff --git a/app/service_invite/rest.py b/app/service_invite/rest.py
index b5f9c95a7..e54fba3cd 100644
--- a/app/service_invite/rest.py
+++ b/app/service_invite/rest.py
@@ -1,3 +1,7 @@
+from re import I
+
+
+from datetime import datetime
 from flask import Blueprint, current_app, jsonify, request
 from itsdangerous import BadData, SignatureExpired
 from notifications_utils.url_safe_token import check_token, generate_token
@@ -12,7 +16,7 @@ from app.dao.invited_user_dao import (
 )
 from app.dao.templates_dao import dao_get_template_by_id
 from app.errors import InvalidRequest, register_errors
-from app.models import EMAIL_TYPE, KEY_TYPE_NORMAL, Service
+from app.models import EMAIL_TYPE, INVITE_PENDING, KEY_TYPE_NORMAL, Service
 from app.notifications.process_notifications import (
     persist_notification,
     send_notification_to_queue,
@@ -23,13 +27,7 @@ service_invite = Blueprint("service_invite", __name__)
 
 register_errors(service_invite)
 
-
-@service_invite.route("/service/<service_id>/invite", methods=["POST"])
-def create_invited_user(service_id):
-    request_json = request.get_json()
-    invited_user = invited_user_schema.load(request_json)
-    save_invited_user(invited_user)
-
+def _create_service_invite(invited_user, invite_link_host):
     template_id = current_app.config["INVITATION_EMAIL_TEMPLATE_ID"]
 
     template = dao_get_template_by_id(template_id)
@@ -43,10 +41,7 @@ def create_invited_user(service_id):
         personalisation={
             "user_name": invited_user.from_user.name,
             "service_name": invited_user.service.name,
-            "url": invited_user_url(
-                invited_user.id,
-                request_json.get("invite_link_host"),
-            ),
+            "url": invited_user_url(invited_user.id, invite_link_host),
         },
         notification_type=EMAIL_TYPE,
         api_key_id=None,
@@ -56,6 +51,15 @@ def create_invited_user(service_id):
 
     send_notification_to_queue(saved_notification, queue=QueueNames.NOTIFY)
 
+
+@service_invite.route("/service/<service_id>/invite", methods=["POST"])
+def create_invited_user(service_id):
+    request_json = request.get_json()
+    invited_user = invited_user_schema.load(request_json)
+    save_invited_user(invited_user)
+
+    _create_service_invite(invited_user, request_json.get("invite_link_host"))
+
     return jsonify(data=invited_user_schema.dump(invited_user)), 201
 
 
@@ -92,6 +96,34 @@ def update_invited_user(service_id, invited_user_id):
     return jsonify(data=invited_user_schema.dump(fetched)), 200
 
 
+@service_invite.route(
+    "/service/<service_id>/invite/<invited_user_id>/resend", methods=["POST"]
+)
+def resend_service_invite(service_id, invited_user_id):
+    """Resend an expired invite.
+
+    This resets the invited user's created date and status to make it a new invite, and
+    sends the new invite out to the user.
+
+    Note:
+        This ignores the POST data entirely.
+    """
+    fetched = get_invited_user_by_service_and_id(
+        service_id=service_id, invited_user_id=invited_user_id
+    )
+
+    fetched.created_at = datetime.utcnow()
+    fetched.status = INVITE_PENDING
+
+    current_data = {k: v for k, v in invited_user_schema.dump(fetched).items()}
+    update_dict = invited_user_schema.load(current_data)
+    save_invited_user(update_dict)
+
+    _create_service_invite(fetched, current_app.config["ADMIN_BASE_URL"])
+
+    return jsonify(data=invited_user_schema.dump(fetched)), 200
+
+
 def invited_user_url(invited_user_id, invite_link_host=None):
     token = generate_token(
         str(invited_user_id),