verfication codes
how do i receive verification codes
MacBook Air 13″, macOS 10.14
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Assuming that you mean “Apple” 2FA Verification Codes … see this article:
Get a verification code and sign in with two-factor authentication - Apple Support
Tip: Put some serious thought into selection of your Trusted Numbers. You’ll most likely need them if/when your phone is misplaced, broken, or stolen.
See additional info on this subject here:
Two-factor authentication for Apple ID - Apple Support