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Check your mail box, if the invoice is from Apple.
See this Apple article: If you see "apple.com/bill" on your billing statement
If you see "apple.com/bill" on your billing statement – Apple Support (UK)
See also -> View your purchase history for the App Store, iTunes Store, and other Apple media services
Read again -> Related Article -> View your purchase history for the App Store, iTunes Store, and other Apple media services
Learn what to do if you can't find the item that you’re looking for or if you find unexpected charges.
If you received a suspicious email notification about a purchase, the email might not be from Apple or reflect actual charges to your account. Learn how to identify legitimate App Store or iTunes Store emails.