What term names an illegal payment returned to someone who helped arrange a contract or sale?

Which brand name has become a synonym for a photocopy? Which brand of beer was advertised with the famous slogan "Tastes great, less filling"? Which breakfast giant makes Froot Loops and Pop-Tarts? The Brothers Grimm tale "Town Musicians of Bremen" is set in which country? A brick house in Portland, Maine, built in 1785 by General Peleg Wadsworth, was the boyhood home of which famous poet,… Complete the phrase meaning to get married: "tie the ___". Which physicist married his nurse after leaving his wife in 1990? A brief thaw in Soviet repression is named for which Soviet leader, who rose to power after Stalin's death?