When you make purchases from the App Store, iTunes Store, or other Apple services in Taiwan, Apple must issue an electronic Government Uniform Invoice and send it to the Ministry of Finance.
When you make a purchase, you agree that the email address that you provide will be shared with the Ministry of Finance.
Change your email address
Apple automatically sends your eGUI receipts to the email address that you use with your Apple ID. If you want your eGUI receipts to be sent to a different email address, contact Apple support.
To check which email address received the eGUI receipt for a purchase, view your purchase history.