"Facebook is expanding how it uses facial recognition to find people in photos. From today, the company will notify users when someone uploads a photo with them in it — even if they’re not tagged. The user will then have the option to add their tag to the photo, leave themselves untagged, or report the photo if they think it’s inappropriate. The feature will also work with profile photos, but won’t be available in Canada or the EU, where data laws restrict the use of facial recognition. "

https://www.theverge.com/2017/12/19/16794660/facebook-facial-recognition-tagging-photos