Purchase of an expensive app. Where do I find out if this is legitimate?
Where do I go to find out if my purchase was legitimate? it was rather expensive.
If all you received was an email, it is very possible this is a phishing attempt to get your account details. Do not interact or click on any links in the email and see this. Avoid phishing emails, fake 'virus' alerts, phony support calls, and other scams - Apple Support
This will help identify legitimate emails from Apple, Identify legitimate emails from the App Store or iTunes Store - Apple Support
Next, check your purchase history to see if there were actual purchases, See your purchase history in the App Store or iTunes Store - Apple Support
If there were not, just ignore the mail, send to Apple as an attachment to reportphishing@apple.com
If there were, and you see a deduction in your bank/credit card account, then see this, If you see 'itunes.com/bill' or an unfamiliar charge on your statement - Apple Support