I am a US citizen and filed for an F4 Visa for my sibling and her unmarried daughter on the original petition. It is time to start the Visa creation process. However my niece now has a newborn child, what can we do to add my grandniece to the case so the baby can go with them and what is the process? The church charity said for my sibling and niece to request a humanitarian visa at the time of their interview but I read that humanitarian visas are only valid for 2 years. If that's the case then does my niece as a green card holder during those 2 years would have to file form I-864 to petition for her daughter for a green card to stay permanently?