We want to integrate Playfab IAP validation for the purchases made from Android and iOS store in our Unity game. Currently the store and and inventory of the game are configured in our own native system. That means, we aren't using Playfab catalog and inventory to manage items and in game or store based purchases. We are using Unity IAP service to make in app purchases.
Question is, can we use Playfab iOS or Android receipt validation system, without configuring item's sku/id in the catalog of the Playfab title?
Thanks in advance.