Firebase is a free Google service that stores your parcel data online.

Open Firebase Console → Firestore Database → Rules tab → replace everything with the block below → click Publish. Without rules, anyone can read & write your data.

rules_version = '2';
service cloud.firestore {
  match /databases/{database}/documents {
    function isAdmin() {
      return request.auth != null
        && exists(/databases/$(database)/documents/admins/$(request.auth.uid));
    }
    function isOwner() {
      return isAdmin()
        && get(/databases/$(database)/documents/admins/$(request.auth.uid)).data.role == 'owner';
    }

    match /admins/{uid} {
      allow read:   if request.auth != null
                      && (request.auth.uid == uid || isOwner());
      allow create: if isOwner();
      allow update: if isOwner();
      allow delete: if isOwner() && uid != request.auth.uid;
    }

    match /parcels/{tracking} {
      allow get:    if isAdmin();
      allow list:   if isAdmin();
      allow create: if isAdmin();
      allow update: if isAdmin();
      allow delete: if isOwner();
    }

    match /publicParcels/{tracking} {
      allow get:    if true;
      allow list:   if isAdmin();
      allow create: if isAdmin();
      allow update: if isAdmin();
      allow delete: if isAdmin();
    }

    match /clients/{code} {
      allow read, write: if isAdmin();
    }
  }
}

This is your Singapore delivery address. We'll send your shipment here once it leaves our China warehouse.

Tick what you want to permanently delete. This cannot be undone. Untick anything you want to keep.