( of an agreement or official document ) having no value, especially legally, or because one of the people involved has no intention of doing what they said they would
NOT WORTH THE PAPER IT'S WRITTEN / PRINTED ON
Meaning of NOT WORTH THE PAPER IT'S WRITTEN / PRINTED ON in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005