I have received the same email.

Thank you so much! You are right, it was https://developer.apple.com/documentation/storekit/skmutablepayment/1620604-simulatesasktobuyinsandbox

Update: My previously postet solution only works with one-time in-app purchases, but when I test it with a non-renewing subscription I get a prompt: "Ask Permission" "A request to buy ... will be sent to your parent or guardian". (the sandbox tester has a birth date in 1960 so I'm wondering why Apple thinks it's a child account) So I can't complete the purchase and testing is impossible :-( Does someone has a solution? Thank you so much!

Hello, I have the same issue. It works fine with one-time in-app purchases, but when I test a non-renewing subscription using my sandbox tester account I get the same message and can't complete the purchase. So testing is impossible :-( Does someone has a solution? Thank you so much!

Hi guys, I found a solution: All the sandbox users that I had setup at https://appstoreconnect.apple.com/access/testers had another App Store country/region setting (not USA). Then I created a new sandbox tester user with App Store Country/Region setting to "United States". Also I did NOT click the verification link from the verification email that you receive after adding a new tester I signed out from the previous sandbox tester account on my iPhone (Settings > App Store > Sandbox Account > Sign out) Then I started the app again that I wanted to test, I started the in-app purchase, signed in using the new sandbox tester data and was able to complete the in-app purchase without receiving the "Terms and Conditions" prompt. Btw: I was not testing using TestFlight. I created an IPA-File in Xcode and airdropped it to my Phone.

Same problem here since last week. Still isn't fixed until today and I can also confirm that interrupted purchases isn't enabled for my sandbox Apple ID. Can someone confirm if Apple is already working to fix it? Thank you so much!

Hello, When it comes to two factor auth, you don't necessarily have to have access to a mobile phone as you can add more numbers to the Apple ID which can be used for 2 factor auth. You could also add your company's landline phone number. So everyone who has access to your office phone could use the 2 factor auth. Maybe that helps...

I have the same message and also don't know what it means. But as other developers seem to be surprised by this as well, it could be a technical issue on Apple's site.