an oral agreement isn't worth the paper it's written on-

an oral agreement isn't worth the paper it's written on-
难道翻译成“一个口头协议还不值得用文书形式写下来”?
还是“一个口头协议不如一张文书来的有价值”?
原句是这样的Thefamous Hollywood mogul Samuel Goldwyn was right:an oral agreement isn'tworth the paper it's written on.