To safeguard user privacy, the Facebook login process requires the input of an e-mail address, username or mobile number as well as a password. While you may opt for the "Remember Me" and "Remember My Password" features on your personal device, there may be times when you need to manually log in to your account. If you're not able to locate your account from the login page, there are several steps you can take to recover it.
If you no longer have access to the email address that is linked to your Facebook account because it is invalid or expired, locate your account by logging in with an alternative. If you registered a username, enter it in the "Email" field on the login page. Enter your password and select the "Login" button. If unsuccessful, type your mobile phone number in the "Email" field on the login page. Enter your password and select the "Login" button. This will work if you've registered for Facebook texts. If unsuccessful, type an alternate e-mail address in the "Email" field on the login page. Enter your password and select the "Login" button. If you are still unable to identify your account, complete and submit the "I Cannot Identify My Account" report, which you'll find at facebook.com/help. Click "Browse Help Center Topics" in the left column. Click the "Login & Password" option under "Managing Your Account." Click on "I Can't Remember Which Email Address I Use To Log In To Facebook" and click the link in option 5. Click the "I Can't Identify My Account" link in the lower-left corner of the resulting page to access the report.
After you've logged in, click the "Account Settings" option that appears in the "Account" drop-down menu in the upper-right corner of any page.
Click the "Change" link next to the "Email" option of the "Settings" tab. View your current e-mail settings and edit as desired to manage e-mail addresses that can be used for login.
Visit facebook.com/recover.php in your browser.
Enter your e-mail address or mobile phone number in the "Email or Phone" field that appears at the top of the page or enter your Facebook username in the space provided. If you don't know the email address, mobile phone number or username that is associated with your account, type your name and the name of a friend in the spaces provided at the bottom of the page and click "Search."
Type the words that appear in the resulting security box to authenticate your request and click "Submit."
If the information that appears on the resulting page matches your account, click the "Reset Password" option to access your account.
Ask a friend to search for you in their Friend List. If your account is still active, they can tell you what your username is.