Why In-App purchase sandbox always ask “Verification Required”?

Question

I have signed out from the store in device settings. I entered user credentials only in my App. I have set up a brand new (actually around 4 times) test user.

Why th

Answer 1

Register a fresh test user for the USA. You can put any email address.

Log out under settings. Delete the app. start it again via xCode login with your new user within the app.

It may say that you are not located in the USA and it opens the browser, Close the browser and start it again.

It should work now.