Facebook is running tests of a new CAPTCHA system that requires users to upload a clear photo of their face to prove the account is not fake and belongs to a new person. The new system is automated, uses facial recognition, and looks for unique photos. Facebook said the system is still under testing and will not share any details about it in order to prevent manipulation. Earlier this month it came to light that Facebook was asking potential victims of revenge porn to upload nude photos in advance. The company later admitted that a Facebook employee would be reviewing all nude photo uploads.
Source: https://www.bleepingcomputer.com/news/technology/facebook-tests-new-captcha-tool-that-asks-users-to-upload-a-photo-of-their-face/