Board Thread:Naruto Gaiden/@comment-3279282-20150504200737/@comment-3967515-20150510053309

Could it just be that Sarada doesn't have birth records in order to protect her from Orochimaru or something like that? sorta like how Naruto's birth was supposed to be a secret and he ended up getting his mothers last name and not his fathers so he wouldn't become a target, but maybe not as Sarada received her fathers last name and people would easily make a connection.