User Profile

Background: We're working on a in-app purchase of a consumable product. Once a user has paid, we'll provide certain service for the user. Once the user has been refunded, we will stop providing the service. We'd like to to notified by any refunds, so that we could stop providing the product accordingly in app. Question: According to the apple doc, we'll receive a CONSUMPTION_REQUEST notification which is "a notification type that indicates that the customer initiated a refund request for a consumable in-app purchase, and the App Store is requesting that you provide consumption data." What we want to know is, is providing the consumption data mandatory? If we don't provide the consumption data, does it mean the user won't be refunded? The reason to ask is that, our product is so simple and we don't have complex logic regarding partial refund, so it seems unnecessary for us to send the consumption data.