for Parents' Visa - Original I797 is necessary?

[DeepakPalkar]

Hi,

My parents have the visa interview date on 17th december.
One of the required documents, my agent has asked to send to my parents is Original copy of I797!

is that necessary? or the copy of I797 will do?

thanks in advance
Deepak

[JStone]

A copy of I797 will do.