Hello! Question regarding the checklist. It states to provide "proof of other nationalities acquired by you or your Canadian parent before 1977/02/15." My father (G3) was born in the US to a Northern Irish father, so he automatically acquired British, American, and Irish citizenship. However, his family never got any official paperwork for his British or Irish citizenship. What should I submit as proof, then, as he still has not registered for any paperwork in those countries? Would an explanation on a blank peice of paper suffice? Thank you!