This post about the so-called Document Discriminator on driver’s licenses. 

DD = Document Discriminator

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. Accordingly, it serves to thwart people who wish to tamper with, counterfeit or duplicate a government document.

Note that the document discriminator does not include the driver’s license number.

The DD has its originated in the 2005 federal Real ID Act. Page 29 of a September 2006 report by the National Governors Association,  the National Conference of State Legislatures, and the American Association of Motor Vehicle Administrators provides the following explanation. 

The Act requires States to incorporate “physical security features designed to prevent tampering, counterfeiting, or duplication of the document for fraudulent purposes.”

Driver’s License / ID Card Standard

As a result of Real ID, AAMVA prepared, and revised over time, a driver’s license / ID card standard. That standard describes the document discriminator as follows:

Number must uniquely identify a particular document issued to that customer from others that may have been issued in the past. This number may serve multiple purposes of document discrimination, audit information number, and/or inventory control.

San Mateo Office

Phone: (650) 308-8624

1900 S. Norfolk Street #350
San Mateo, CA 94403

San Francisco Office

Phone: (650) 308-8624

201 Spear Street Suite 1100,
San Francisco, CA 94105