Immigrants want to take care of their children with their ex-husbands. Do they need his signature?

According to the regulations, the "no objection statement" in the immigration documents must be signed by the ex-husband before the children can immigrate. For the father's consideration, it may be difficult to see children in the future, but you can explain to your father the benefits of immigration to children's future education and personal development. In addition, the advantage for the father is that after the child gets the identity, he can also apply for reunion immigration for his father in the future.