To ensure that you are getting a quality asphalt or sealing job make sure that your contractor is licensed in the state. You can do this by contacting several different agencies. Contacting the BBB and the Register of Contractors is very important and will allow you to see if the contractor you plan to hire is licensed and in good standing. You will also be able to determine if there are any complaints against the contractor as well. Additionally, ask your contractor for a list of referrals. A contractor should be able to provide you a list of current clients that you can use to check out the work of a contractor. Doing these things can ensure a quality job that you will be happy with.