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]
(..) through each of the three casinos. -We're gonna rob it. -Smash-and-grab job? Slightly more complicated than that. Well, yeah. This is courtesy of Frank Catton, a new dealer at the Bellagio. Bad news first. This place houses a security system rivaling most nuclear silos. (..)2001 Ocean's Eleven