Search the person’s profile on Facebook
Check if their profile no longer appears in search results
Open old messages with that person and see if their profile picture and name are gone or unavailable
Try visiting their profile link directly if you have it
Look for a message such as “This content isn’t available right now”
Check whether you can tag them in a post or comment
See if their name no longer appears in mutual friends lists
Ask a mutual friend to search for their profile
Compare results from another Facebook account if appropriate
Check whether you can send them a friend request
Check whether you can view their posts, comments, or timeline from past interactions