He didn't even have the 'common courtesy' [=he was not even as polite as people can usually be expected to be] to say goodbye when he left.
He picked up the airport 'courtesy phone' [=a telephone that customers can use to call the company that provides it] to call for a car.
They paid a 'courtesy call' on the ambassador. [=they visited the ambassador because it was the polite thing to do]
(..) It's locked, okay? Come on. Taxi! Defense sent over the investigation files as a courtesy. No, they didn't. Nobody does anything as a courtesy. They sent those files because that's (..)2011 TvShow: Suits Title: Pilot Season: 1 Episode 1