Your best defense is preparation. Set up multiple recovery options before you get locked out. Keep your contact information current. And always remember: the "identify" step is there to protect your digital life, not annoy you. By understanding how it works, you can turn a frustrating barrier into a seamless security feature.
If you were looking for a specific technical essay or a different angle (e.g., how "Login with Facebook" identifies you to third-party apps), please clarify, and I can tailor the response accordingly. Facebook.com Login Identify
If you no longer have access to that email or phone, look for the link that says "No longer have access to these?" . You may be asked to provide a new email address and potentially upload a government ID to prove your identity. Step 4: Reset Your Password Your best defense is preparation