Recently, we completed a merger with our parent company. We are currently integrated with Apple Pay in accordance with the “Apple Pay Payment Processing on the Web” guidelines. Due to the change in the legal entity, we proceeded with the account migration process as outlined below: Creation of a new Apple Developer account and a new Apple Pay Identifier Removal of the Merchant Domain (dc2-web.happy.co.kr) from the existing Identifier Registration of the Merchant Domain (dc2-web.happy.co.kr) under the new Identifier Using the Merchant Domain registered under the new Identifier and the Apple Pay Merchant Identity Certificate issued from the new Identifier, we attempted to obtain an Apple Pay session by sending requests to the following endpoint: https://apple-pay-gateway.apple.com/paymentservices/startSession However, we are intermittently receiving failure responses with an HTTP 400 status code. With regard to these intermittent failures, we would like to inquire whether there is any propagation delay on Apple’s servers when an Apple Pay Identifier is removed and re-registered under a new account, or if there could be any other possible causes for this behavior. We would appreciate your guidance on this matter.

'Company A' is scheduled to merge with its parent company, 'Company B'. Both A and B have Apple accounts. A's account has one domain registered for Apple Pay integration, while Account B has no domain registered. We attempted to register A’s domain under B’s account. However, the notification 'Requested domain name has been verified previously.' appeared, and we could not complete the registration. Please confirm whether it is correct that a domain already registered under Account A cannot be registered again under Account B. If we cannot register same domain in two accounts, we believe that the domain registered under A's account must be deleted first and then registered under B's account. In that case, will payments become unavailable immediately upon deletion of the domain, or will payments still be possible for a certain period of time after deletion? In our testing, we found that payments were not blocked immediately, but we would like to confirm further. We are concerned about the possibility of transaction failures during the short period between deleting the domain from A's Account and registering it under B's Account.