Quote from Woody in Heeeeere's... Cliffy!
Sam: Damn it, now, why is Cliff having his personal mail sent to my bar? Frasier: Well, when you've been harassed by as many agents of the government as Cliff has, you naturally develop a reluctance to give them your own return address. Norm: Ah, Cliffie got a letter from The Tonight Show in California. Paul: Is he still trying to sell jokes to Johnny Carson? When's that poor guy gonna give up. Woody: He is. I hear he's leaving the show at the end of May.