Before hiring a locksmith in Illinois, make sure to ask for proof of their license and insurance. A reputable locksmith will have no problem providing this documentation. You can also check with the Illinois Department of Financial and Professional Regulation to confirm that the locksmith is indeed licensed. Alongside these credentials, it's a good idea to verify if the locksmith has positive reviews from customers or if they are a member of professional organizations such as the Associated Locksmiths of America (ALOA). This information can reassure you that you’re dealing with a reputable and qualified professional.