Creating a complex password for Facebook is a reliable security custom to protect your account. However, you are possible to meet the quandary like "I forgot Facebook password" especially when you type the password of an account which have not used for a long time. If you have returned to Facebook, you find that you can't access to your Facebook account. Luckly, there are 2 approaches that are worth looking into if you forgot Facebook password.
This might be a rather unfortunate situation you're finding yourself in. In the meantime, you still are permitted access to the email address you signed up with, but you may fail to recall which one you used at the time. The Facebook help page suggest the following actions:
Ask one of your Facebook friends to look at the About section of your profile and send you the email address listed in the Contact Information section.
Try entering every email address or mobile number you've owned (one at a time). You may have added an email address or mobile number to your account and forgotten about it.
Enter your username. Your username is your personalized Facebook URL:
If you don't know your username, ask a friend to go to your profile and send you the username in the URL.
Try entering variations of your name, just in case you signed up using a nickname.
Try a variety of friends when you're asked to enter a friend's name, if the first friend you try doesn't locate an account. Do not forget to enter your friend's full name, not just their first name.
If indeed you have no access to you email address either, perhaps because you signed up with Facebook using a 10 Minute Mail email address, or something similar, you have a bigger problem, but it's not impossible, if you have set some of your friends to be 'Trusted Contacts".
From the relevant help page:
If you're locked out of your account, you can use trusted contacts to get access to your account. If you have trusted contacts set up:
Click Forgot your password? and find your account.
Follow the instructions to use your trusted contacts to get back into your account.
You'll receive a set of instructions that includes a URL. The URL contains a special security code that only your trusted contacts can access. Call your friends and give them the URL so that they can open the link and give the security code to you.
Use the security codes from your friends to access your account.
If you don't have trusted contacts set up, learn how.
Please be sure to call your friends or talk to them in person. If your account was hacked, the hacker could have access to your emails as well.