N-14 for child support proof

[vicknick]

I got N-14 for proof of child support after citizenship interview, from my ex wife i had a child who was born in US, now in india as ex was on h4 that time. we got separated before i got my green card in 2012 and finalize divorce in 2014 through court. since there is no child support in our divorce. my parents gave cash money to ex for child support. What should I be required to submit in reply, what documents are good enough to proceed with. Also any documents there, when I get, can I submit copy of those If i get scanned copies instead of original