a bad penny always turns up

Ah, Weener, as you yourself would undoubtedly put it in your inimitable way, a bad penny always turns up.

The first of the two RAF Lancasters chosen for the test flight was nicknamed "Bad Penny" from the old expression: "a bad penny always turns up."

As for the news about Bonnet A bad penny always turns up, had been his cynical opinion, expressed when Bonnets body had failed to be discovered after Brianna had shot him.

Returned to England with John Tilly, in TO THE FAR BLUE MOUNTAINS, but a bad penny always turns up, so. . . .