Hi Zoule, If your friend would like to delete his account, but don't remember his log in information, learn more about the steps he can take in our Help Center:
When you deactivate your account, Facebook saves all of your settings, photos, and information in case you decide to reactivate your account. Your information isn't gone—it's just hidden. However, it is possible to delete your account permanently with no option for recovery. You should only do this if you are absolutely sure you want to Delete Facebook Permanently Following These Steps, If You Mar 23, 2018 How to Delete Your Facebook Account Permanently - Quantum Mar 31, 2020 To permanently delete your account: Click at the top right of any Facebook page. Click Settings then click Your Facebook Information in the left column. Click Deactivation and Deletion. Choose Delete Account, then click Continue to Account Deletion. Enter your password, click Continue and then click Delete Account. Click Deactivation and Deletion. Choose Deactivate Account, then click Continue to Account Deactivation and follow the instructions to confirm. Classic Facebook. Click at the top right of any Facebook page. Click Settings, then click Your Facebook Information in the left column. Click Deactivation and Deletion.
Deleting your Facebook account should remove all traces you from the social network, but you can actually scroll back through your Facebook history and undo it, one like at a time.
How to permanently delete your Facebook account | iMore Jan 30, 2019
Mar 22, 2018 · Before you delete Facebook permanently, consider downloading the photos and other data you have stored there (it’s probably a lot). And a quick note: When you delete your account, it may take up
If you’d like to come back to Facebook after you’ve deactivated your account, you can reactivate your account at any time by logging back into Facebook or by using your Facebook account to log in somewhere else. Remember, you'll need to have access to the email or mobile number you use to log into complete the reactivation. How To Delete Your Facebook Account Permanently Sep 29, 2018