not worth the paper it's printed on

not worth the paper it's printed on

Useless; unimportant; insignificant. Oh, that memo is not worth the paper it's printed on. You know the boss is going to completely change her mind about it in a few days anyway! Due to the recent hyperinflation, the nation's currency is now not worth the paper it's printed on.
See also: not, on, paper, print, worth
Farlex Dictionary of Idioms.

not worth the paper it is written on

(of an agreement, promise, etc.) of no value or validity whatsoever.
See also: not, on, paper, worth, written
Farlex Partner Idioms Dictionary

not worth the paper it’s ˈprinted/ˈwritten on

(of a written agreement, document, report, etc.) not having any value, especially legally, or because the person involved does not intend to do what they say they will: The promises in this letter aren’t worth the paper they’re written on.
See also: not, on, paper, print, worth, written
Farlex Partner Idioms Dictionary
See also:
  • be not worth the paper it's printed on
  • be not worth a fig
  • fig, not care/give/worth a
  • mere trifle
  • back street
  • be nothing to (one)
  • be/mean nothing to somebody
  • Who breaks a butterfly upon a wheel?
  • cipher