Forgotten Recovery key

Hello muili,

This article explains how recovery keys work: How to generate a recovery key - Apple Support. Please take note of this section: "Using a recovery key is more secure, but it means that you’re responsible for maintaining access to your trusted devices and your recovery key. If you lose both of these items, you could be locked out of your account permanently. With that in mind, it's important to keep your recovery key in a safe place. You might want to give a copy of your recovery key to a family member, or keep copies in more than one place. That way you always have your recovery key when you need it."

Secondarily, review this article that speaks specifically about your recovery key: Two-step verification for Apple ID - Apple Support.

"What if I lose my Recovery Key?

You can sign in to your Apple ID account page and create a new Recovery Key using your Apple ID password and one of your trusted devices.

1. Go to appleid.apple.com.
2. Sign in with your password and trusted device.
3. In the Sign-In and Security section, click Recovery Key > Change Recovery Key.

Keep your new Recovery Key in a safe place. Your old Recovery Key won't work anymore and you can't use it to reset your password or access your account. If you don't see Recovery Key in the Sign-In and Security section, then you are not using two-step verification. "

We hope this helps. Let us know if we can assist with anything else at all. Take care.