Wiktionary
courtesy copy
n. 1 (context originally English) carbon copy 2 (context Internet English) A copy of an email sent to a person other than the main recipient
Usage examples of "courtesy copy".
CID in Perth will be getting their official copies of the autopsy report tomorrow, and I'm sending a courtesy copy to your Inspector McLeod.
A courtesy copy will be furnished to Ambassador Jayben Spears, of course.
One was a letter from a Parisian clipping service, stating that Debierue's name had been mentioned twice in the foreword to a new art history pictorial collection, but inasmuch as the illustrated volume was quite expensive, the manager had written to the publisher and requested a courtesy copy for Debierue.