Will USCIS return my doccuments for this reason?

so i am supposed to make copies of my green card and the back of the card has a shiny tint to it so it changes reflections and stuff... so when i am making a copy it doesnt come out very clear and its usually dark. If i lighten it, it will not show everything on the copy. I made tons of copy so is it ok to send them all just in case? I heard that USCIS will return the documents if they are not clear and readable :(