My fiancé got a RE2 blue sheet after 1st interview & needed to include more evidence, including filling in Spouse Evidence Form. - In the Spouse Form, the part of each side's family tree - family relationship I have trouble answering. I'm the petitioner, my mum & dad got divorced 22 years ago, my grandparent from dad side is long gone, I don't know when they were born, and I lost contact with my dad, we didn't end in good term, so how do answer birthday section? Should I says I don't know?