父母绿卡申请, 请教8 老师，谢谢！！

They are in China.

I received two letters, one for my father and one for my mother requesting the same additional information. I only have one original of my parents' marriage certificate.
Also, I got divorced years ago in China. They ask me to submit both prior and current marriage certificates. I Don't have prior marriage certificate, but a court order for divorce. Can I send it to them instead of prior marriage certificate? Again, I only have one original.

Thank you so much for all your help!