Two step verification

Hello,

• Apple normally does not ask for a security code from a credit card for Two factor authentication. It is a code sent to another Apple device that you have to enter on the Apple device you are using. You can find out more here: https://support.apple.com/HT204915
• It could also be that you are in the option for adding or editing a payment method for your Apple ID and is asking for a security code on the credit card.

Thanks for the screenshot, that was very helpful :)

It is verifying payment info on your Apple ID. Did this come up randomly, when you tried to download an app etc?

• You can try going to this website and adding a new payment method: https://appleid.apple.com/account/manage/section/payment