Fix a Login Problem
Login Help
Recover Your Facebook Account if You Can’t Log In.
Troubleshoot login with a phone number on Facebook
Find your account from the "Find your account" page
I have to enter a security code every time I log into Facebook.
Password Help
Unable to reset password because of password reset limit
Problems with resetting your Facebook password
Recover Your Account If You Can’t Access the Email or Mobile Number on the Account
