How do state DMV's check if you already have a licence in another state and you are trying to get an ID card?

State DMVs use a national database called the National Driver Register (NDR) to check if applicants hold a driver's license or ID card in another state. When you apply for an ID, the DMV will run your information through this database to verify your identity and check for any existing licenses. Additionally, they may also cross-reference with individual state databases to ensure compliance with state laws. This process helps prevent fraudulent applications and ensures that individuals do not hold multiple licenses.