Q: I am receiving receipts for app purchases e.g. bags of gems for an app my son has but I know it's not him who's purchased the items. How can I find out what device they're being bought on? Or how do I complain about these purchases?  Thank you

If I may ask, how do you know it's not him? Those are almost certainly in-app purchases, and easily made unless you've turned off the option to make in-app purchased in the iOS device. So how are you certain that he hasn't made these purchases?

As to your specific question, no, Apple cannot tell you what device made these purchases. It could have been done from any device that could connect to your iTunes Store account.

Regards.

You need to punch in the passcode for any purchase right, not just for new apps??

If one of the other students, or anyone else, got access to your iTunes Store account, necessary to make any purchases, then they'd have all the information they'd need to also make in-app purchases. But an in-app purchase can only be made through the account through which the original app was purchased. Either your son bought the game (free or paid) and then shared it with someone else along with the account information (necessary to authorize the app on someone else's device), or someone else downloaded the game as well, not just made in-app purchases.

In any case, changing your iTunes Store password should now have cut off any such unauthorized activity, though of course if your son gives the new password out, you'll be back to square one.

Regards.

Do you know if there is A way to find out what city it was purchased in??? I know it's a grab at straws but still wondering. TIA