Under the new enhanced ID system, there's a 2nd # on the DL / ID card that's confusing. Do not use the number identified as 5 DD-REF*.
*DD is an abbreviation for Document Discriminator. A number of states started adding this piece of information to their driver's licenses several years ago. The DD is a security code that identifies where and when the license was issued. It, thus, uniquely identifies each card for a given individual
