diff --git a/app/service_invite/rest.py b/app/service_invite/rest.py
index da7fe5794..333c5dbac 100644
--- a/app/service_invite/rest.py
+++ b/app/service_invite/rest.py
@@ -1,3 +1,4 @@
+import base64
 import json
 import os
 from datetime import datetime
@@ -48,9 +49,28 @@ def _create_service_invite(invited_user, invite_link_host):
         current_app.config["SECRET_KEY"],
         current_app.config["DANGEROUS_SALT"],
     )
+
+    # The raw permissions are in the form "a,b,c,d"
+    # but need to be in the form ["a", "b", "c", "d"]
+    data = {}
+    permissions = invited_user.permissions
+    permissions = permissions.split(",")
+    permission_list = []
+    for permission in permissions:
+        permission_list.append(f"{permission}")
+    data["from_user_id"] = (str(invited_user.from_user.id),)
+    data["service_id"] = str(invited_user.service.id)
+    data["permissions"] = permission_list
+    data["folder_permissions"] = invited_user.folder_permissions
+    data["invited_user_id"] = str(invited_user.id)
+    data["invited_user_email"] = invited_user.email_address
+
     url = os.environ["LOGIN_DOT_GOV_REGISTRATION_URL"]
     url = url.replace("NONCE", token)
-    url = url.replace("STATE", token)
+
+    user_data_url_safe = get_user_data_url_safe(data)
+
+    url = url.replace("STATE", user_data_url_safe)
 
     personalisation = {
         "user_name": invited_user.from_user.name,
@@ -75,32 +95,6 @@ def _create_service_invite(invited_user, invite_link_host):
         json.dumps(personalisation),
         ex=1800,
     )
-    # The raw permissions are in the form "a,b,c,d"
-    # but need to be in the form ["a", "b", "c", "d"]
-    data = {}
-    permissions = invited_user.permissions
-    permissions = permissions.split(",")
-    permission_list = []
-    for permission in permissions:
-        permission_list.append(f"{permission}")
-    data["from_user_id"] = (str(invited_user.from_user.id),)
-    data["service_id"] = str(invited_user.service.id)
-    data["permissions"] = permission_list
-    data["folder_permissions"] = invited_user.folder_permissions
-
-    # This is for the login.gov service invite on the
-    # "Set Up Your Profile" path.
-    redis_key = f"service-invite-{invited_user.email_address}"
-    redis_store.raw_set(
-        redis_key,
-        json.dumps(data),
-        ex=3600 * 24,
-    )
-    # TODO REMOVE DEBUG
-    print(hilite(f"Save this data {data} with this redis_key {redis_key}"))
-    did_we_save_it = redis_store.raw_get(redis_key)
-    print(hilite(f"Did we save the data successfully? {did_we_save_it}"))
-    # END DEBUG
     send_notification_to_queue(saved_notification, queue=QueueNames.NOTIFY)
 
 
@@ -225,12 +219,7 @@ def validate_service_invitation_token(token):
     return jsonify(data=invited_user_schema.dump(invited_user)), 200
 
 
-@service_invite.route("/service/invite/redis/<redis_key>", methods=["GET"])
-def get_service_invite_data(redis_key):
-    service_invite_data = redis_store.raw_get(redis_key)
-    # We can't log this because key may contain PII (email address)
-    if service_invite_data is None:
-        raise Exception("No service invite data")
-    else:
-        service_invite_data = service_invite_data.decode("utf8")
-    return jsonify(service_invite_data), 200
+def get_user_data_url_safe(data):
+    data = json.dumps(data)
+    data = base64.b64encode(data.encode("utf8"))
+    return data.decode("utf8")