We need to add Dh's father to his birth certificate so he can apply for citizenship of that country. Unfortunately, his father died 40 years ago and isn't here to take a DNA test.
Dh has uncles who I think would be willing to take a DNA test to prove their link to him. He also has a half sister who has taken an informal DNA test (ANcestry.com) and they've matched as half siblings. She has their father on her birth certificate. We could pay for her to have a legal DNA test to prove the link.
Currently, there is no one in the "father" section on DH's cert, if that is relevant.
I've asked and been in touch with local family law firms and no one had dealt with it and was passed other numbers.
I've researched and found cases where people were able to get DNA from a deceased person to add them to a child's birth certificate but nothing exactly like this.
Any thoughts?