Moving is a stressful time and the men tasked to help you have a dangerous job. It is important to make sure you are working with a licensed and insured mover so that you do not expose yourself to additional liability. Movers that are in compliance are not going to offer a price that is too good to be true. Aside from background checks and drug tests, good movers demand a reasonable wage and have costly insurance. Most moving companies pay between 15 and 20% of payroll into a workers compensation policy. The Public Utility Commission in Pennsylvania Requires movers to be licensed in PA but only concerns themselves with a companies automobile and liability policy during their yearly vetting process. It is important to know whether your moving company uses employees or subcontractors and whether or not they have all proper insurances in place.
Avatar relocation has a great article explaining the consequences that can result when you hire a contractor that uses uninsured or independent labor to complete work on your property. Check out that article here