Not worth the paper it's written/printed on phrase
(Of an agreement or formal document) having no legal validity, or because one of the parties involved has no intention of performing what they promised.
They signed a year's lease on this place, but it's not worth the paper it's written on.
That contract isn't worth the paper it's printed on now because you has infringed the terms and conditions.
Used to express one's suspicion that something that has been achieved was not worth all the effort or sacrifice made
To mark a surface by pressing letters/names/etc into it.
If you swallow the bait, you take something that someone offers you, or agree to do something that someone asks you to do without knowing that it is a trick or way of getting something from you.
You can't just do whatever he wants you to do. Don't swallow the bait.