this is an excerpt from the FAQ from the US embassy in Lagos when i inquired from them about some issues:
Q8: What documents do I need to bring?
A: The required documents are listed on the checklist provided by NVC or on our prior communications with you. Remember, however, that each case is different. Please remember to bring ORIGINAL records of birth, marriage, divorce, police certificates, etc., including birth certificates of the petitioner if the petitioner is a son, daughter or sibling of the applicant. Please bring photocopies for us as well.
You must bring an international passport. If you are qualified for the visa, we will keep it until the visa is printed and placed in the passport. Please make sure that the passport is valid for at least six months, and that there are no written observations. If there is a written observation, you will be asked to get another passport. For more details about original documents, please visit:
http://www.travel.state.gov/visa/immigrants/info/info_3741.html.
so my guy have faith in God leave your passport that way and make a birth cert that reads mushin as your POB