Yes, it happened to me twice. What they did was open their own square account. Then when a customer was checking out, they didn't ring up the sale. They added the merchandise up on a calculator. Then they ran square from their account and they got my money! They stole thousands. I caught the last person because I put a camera in the store so I could see the register. Even if you don't allow them to bring in cell phones, , they can download the app on your business phone, take your money and delete the app when they clock out.
