What is required when Cambodian fiance has a child from a previous relationship?

[J.Z. 0]

My apologies if this has been covered, but I could not find any specific answers. I have received a case number from the NVC, and am awaiting word of receipt of the approved I-129f package for a K-1 visa from the Embassy. My fiance has a child from a previous relationship where the "father" is not involved, and we have a child together as well. Of course the first child was listed on the application, and we will be applying for a K-2 visa as I consider both children as ours. She has always been the primary care giver and she has always been in her custody, but he is on the birth certificate. What I would like to know is if there is a specific process for the "father" to give his permission to allow the child to travel with us? I assume there may be more to this than a signed/notarized travel letter with him giving permission? Would really appreciate any help.

[Georgia16 2,858]

Some embassies want a notarized letter there gives permission to immigrate the child to the us and some embassies just want to see proof of sole custody so it really depends on the embassy you are going through. If you think you can get the letter from the bio father then that would make it easy as you have it for the embassy plus the custody

[J.Z. 0]

Thanks for the reply. I was hoping for more Country specific info, but haven't been able to get any here or anywhere else. I will go ahead with the written letter from the father, hopefully that will be sufficient.