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3. not worth the paper it's written on

not worth the paper it's written on

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not worth the paper it's written on

 and not worth the paper it's printed on

Fig. [of a document] meaningless or without authority; of no value. That contract isn't worth the paper it's written on. All the signatures are forged. Don't take a check from that guy. It's not worth the paper it's written on.

See also: not, on, paper, worth, written