Then you run the risk of the contractor running off. Like I've had.
Send him the proper due notice for a bad check. Wait the appropriate amount of time
file small claims. Wait for court date
use the judgement to put a lein on something with a title and get paid when that gets sold or the amount of time goes by you can file to take it.
or garnish wages and seize the bank accounts.
Or work it out in trade and save a bunch of time