This question is about In-App Purchase. This is an inquiry from one of our customers. We have set up a free trial. This is your first time using the service, but you have stated that you have been charged. Document. https://developer.apple.com/documentation/appstorereceipts/is_trial_period 「You can use this value to determine whether the specific record is in a subscription trial period. If a previous subscription period in the receipt has the value "true" for either the is_trial_period or is_in_intro_offer_period keys, the user is not eligible for a free trial or introductory price within that subscription group.」 Our expectation is that is_trial_period is true. Receipt is not contain is_trial_period : true or is_in_intro_offer_period : true. Only one case has occurred. Other customers are no problem.