If you downloaded ArcheAge War through the Google Play Store,
you can set a payment password to prevent accidental purchases.
■ How to Set a Google Play Store Payment Password
1. Go to the Google Play Store and tap your profile picture on the right side of the search bar.
2. Select Settings > User Controls > Require authentication for purchases.
3. Select "Authenticate every time you make a purchase through Google Play on this device."
4. Set a payment password for your Google account.