I understand that, sometimes when paternity is in doubt they may invite you/entire family for an interview. Trust Oyibo man, dem go look pikin face, head, nose, mouth, and even behaviour sef, whether the pikin go fall hand. If pikin call you ''Papa'', better, because any man fit be ''Daddy'', we dey see am for church and home video.
True story: My brother in-law, wanted to take his nephew along with him to Canada, the immigration officer was not too sure about the boy's paternity, because of he had provided a sworn affidavit of birth. They were all invited for an interview, and when they were all seated with the immigration officer, the lady casually asked the young man; ''Hello Fred, I hope your
Uncle brought you all to Accra by air, and the boy said, yes. Again, she repeated a similar line, Okay Fred please just move over to the seat behind your
Uncle, and the boy innocently obeyed. To cut short what happened afterwards, my in-law failed the interview. I am sure you all know why!!!!!.( The young man never corrected her; ''you mean my Dad?'').
Bros Awoderu, but if I may ask, do you have immunization records of your children?, I have immunization certificates for all my children, and all the vaccines given are recorded with dates, the child's name is there with DOB, parents name,etc. Also, there is usually a birth certificate issued at the hospital where the baby is born, which is usually part of the child's medical history. I believe you can provide some sort of medical history just as
Seglad suggested, although this is not really a 100% proof of paternity, but it may help.
At worst, be the first to suggest a DNA test, once they begin to express doubt, you never know, the officer may just say;
''Oh never mind Mr Awdru(oyibo pronounciation), the certificate and other documents you provided would be just fine'' ;D ;D