Contact them another way to ask if it is real. Trust no one: If you get a message from anyone - a friend, family member or official sounding stranger - asking for help, security codes, money or personal information, do not reply.This is not necessary for the vast majority of casual Facebook users. A small dongle you carry on you at all times like the kind made by Yubico, a security key needs to be plugged into or tapped on the device you’re trying to log in on. Security key: Instead of using a text message or smartphone app, this option will let you authenticate your identity with a physical security key.Using an app instead of text protects you from a serious but uncommon type of hack called a SIM swap. We recommend downloading a free, reputable authentication app like Twilio’s Authy or Google Authenticator ( iOS, Android). Authentication app: This works similar to the text option, but you will open a third-party app to get the numeric code instead of a message.
This is the simplest option and a huge improvement over just a log-in email and password alone. Text message (SMS): Facebook will text a number to your phone that you have to enter into the website or Facebook app when you log in, after you enter your password.
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