carbon copy

ot noun

1. A copy produced in an alternated stack of ordinary sheets of paper and carbon papers. The pressure applied on the top sheet (by a pen or typewriter) causes every carbon paper to release its carbon cover, thus reproducing the writing on the subjacent layers of paper. In preparing the contract, we'll make a carbon copy for our records.
2. Any duplicate. This new home is simply a carbon copy of the one down the street.

fe’l verb

1. To create a carbon copy of. Please carbon copy this contract for our records.
2. To send a duplicate copy of an email to.