not worth the paper it is printed on


not worth the paper it is printed on
not worth the paper it is written/printed/on phrase
used for saying that a written agreement is not worth having because the person who signed it is not likely to do what they said they would do

We signed a year’s lease on this place, but it’s not worth the paper it’s written on.

Thesaurus: ways of saying that something has little or no valuesynonym
Main entry: paper

Useful english dictionary. 2012.