Can my ex boyfriend give his parents temporary custody of our daughter when joining the coast guard?

Asked by Lothloriengaladriel (1560) February 6th, 2011 from iPhone

I really can’t stand his parents and I really question if it’s even legally possible for him to do this; his parents don’t work and he says when he goes to avoid giving me full custody he will give his parents custody .. The thing is we’ve never been to court for shared custody, and she lives with me, though he did sign the birth certificate and she has his last name, does he have the right to give his parents his custody even though he doesn’t legally have custody of her?