Hello everyone,
According to Google's document, every receipt must be acknowledged. Otherwise they will be refunded automatically.
https://developer.android.com/google/play/billing/integrate
Note: If you do not acknowledge a purchase within three days, the user automatically receives a refund, and Google Play revokes the purchase.
Does PlayFab acknowledge receipts automatically when I call ValidateGooglePlayPurchase API or do I have to acknowledge receipts on the client-side?