Board Thread:Naruto Gaiden/@comment-3279282-20150504200737/@comment-24593592-20150510072939

NoSkoolThrasher wrote: 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.

Actually, that was fanon that is fills hole the Uzumaki were targeted for destruction. The Uzumaki is a famous name hence why Naruto got it. That's how Japanese culture works.