(not) be worth the paper it's/they're printed/written on

if an agreement or decision is not worth the paper it is written on, it has no value or importance.

A qualification like that isn't worth the paper it's written on.

• can't keep hands off someone
• can't keep your eyes off
• can't keep your eyes off someone
• can't keep your eyes off something
• can't keep your hands off
• can't keep your hands off someone
• can't make head nor tail of
• can't make head nor tail of something
• can't make head or tail of
• can't make head or tail of something
• can't put a foot wrong
• can't see beyond the end of nose
• can't see beyond the end of your nose
• can't see past the end of nose
• can't see past the end of your nose
• can't see the wood for the trees
• can't stand the pace
• can't take eyes off
• can't take eyes off someone
• can't take eyes off something
• can't take the pace
• can't take your eyes off
• can't take your eyes off someone
• can't take your eyes off something
• can't tell arse from elbow