WORTH-3: meaning and examples
Today's expression is: not to be worth the paper it's written/printed on
Meaning: used to describe an agreement or official document that, in your opinion, has no value, either legally or because you don't trust one or more of the people involved.
Be careful. That contract isn't worth the paper it's written on. All of the signatures are false!
I would not accept a cheque from that man. I know his business is not going well. Even if he writes you a cheque, it wouldn't be worth the paper it's printed on.
Have a great day!