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]
(..) Lady Stark is here... Who asked you? You're not Lord Frey yet, not until I die. Do I look dead to you? - Father, please... - I need lessons in courtesy from you, bastard? Your mother would still be a milkmaid if I hadn't squirted you into her belly. All right, you come forward. There. (..)2011 TvShow: Game of Thrones Title: Baelor Season: 1 Episode 9