What to Do When Facebook Isn't Sending Security Codes

If you aren’t receiving Facebook security codes, check your internet connection, spam folder, and make sure two factor authentication is turned on.

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How to Log Into Facebook If You Lost Access to Code Generator

Scam alert: Don't fall for this dangerous 'Facebook Confirmation Code' scam

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How to Set up Two-Factor Authentication on Facebook

OMG, my Facebook was hacked! Here's what to do

Facebook Will Force More At-Risk Accounts to Use Two-Factor

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How to verify Instagram if it won't send me code - Quora

Secure Your Account with Two-Factor Authentication

And you thought 2FA was good for you! Facebook isn't letting you opt-out of having people search for you by your phone number • Graham Cluley