If everyone has such a problem with lowballers "taking" jobs on them why don't you just send the IRS, pesticides cops or whoever to the jobsite when they are there? Do you send in copies of your insurance when you bid a job? Ask the owners/managers if everyone sends the insurance info in with the bids. Maybe you can tell them to add proof of insurance to the bid form. Here in Ontario most tenders ask for the insurance info on the forms. <br> I'm not a rat but if I lost out jobs because the other guy didn't have insurance or pesticides permit I would be calling Crime Stoppers and getting a $1000 reward. It's easier than cutting grass.