Collect checks without being legal. I think someone is not the sharpest tool in the shed.
Even checks made out to cash can be traced back to you. If the gov wanted to go after you for back taxes you are toast.
I tell my customers I have to charge sales tax. They say they will make the check to cash. I tell them the IRS will not believe I have that many aunts and that many birthdays.
Also there is a guy on here, procut. His story is a lesson to keep personal money separate from business money and at two different banks. Maybe he would of not lost his business.