Hi, I have multiple FB accounts that are 5 years old suddenly many of them asked to upload a photo to confirm the identity claiming a suspicious activity. I just post a daily status update on each account. The block just appears suddenly while actually logged in not during the login process! 1) Would it be for example that the profile photo is used on multiple accounts? 2) May be accounts with celebrity names trigger the block as well? 3) Do you face this or only me? 4) What measures should I take to prevent it from happening? Thanks!