You can use this customer identifier on any form or application that asks for your driver's license number.ĭD stands for 'document discriminator.' It is an internal number that state agencies use to identify a particular document, such as your driver's license, from other documents that may have been issued in the past. The Colorado DMV is simply using a different term for the same number. The customer identifier is your driver's license number. Instead, you see two terms on the license that might be unfamiliar to you: 'Customer identifier' in field 4d and 'DD' in field 5. Conspicuously missing from the Colorado license, however, are the words 'driver's license number.' It contains a lot of useful information in list form, including your personal identification information and photo. Newly licensed drivers in Colorado may have noticed the state's creative driver's license design.
