Hi winx28,
Not necessarily...
I think Ang important Lang nmn Dyan is may evidence na child mo talaga siya (NSo bc), ma-pass niya medical, and if Hindi siya child ng sponsor mo, may consent from the other biological parent na umalis with you if migrating din siya (so Kung child din siya ng sponsor mo mas OK basta nsa NSo BC din siya)...
Ang Medyo mas mahirap/matagal is pag 18 and above na Ang child tpos gusto isama migrate, or late registered Ang BC ng bata (Baka need other evidence of identity), or Hindi makapag medical Kasi Ayaw payagan ng other parent and that other parent is not the sponsor
This is from what I know and read Lang..