"We're here to flush out the spurious coins that are not of value to the city.

You can always detect spurious coins and counterfeit bills by some means or another.

Al-Nasir minted a few thousands coins to fight the spurious coins.

They won't register time for spurious coins."

Peg thought that in this way she should be more likely to escape suspicion when occupied in passing spurious coin.

Fix spurious coin drop on startup on some conversion kit machines.

That I should innocently take a bad half-crown of somebody else's manufacture, is reasonable enough; but that I should knowingly reckon the spurious coin of my own make, as good money!

It is worth noticing that she was not above passing spurious coin, and doing other things which are stamped as disreputable by the laws of the land, but her pride revolted at the imputation that she was a washer-woman.