why do some states have driver licenses letters before the number
Some states require you to have a social security number before you can get a driver's license. If you are not eligible to get a social security number (e.g., because you are on an H4 visa), you will need to get a letter from the SSA and apply for an ITIN (Individual Tax Identification Number).ithout a driver's license, it is illegal to operate a motor vehicle. Driver's licenses are issued by each state in the United States. The rules and regulations vary in various states. However, a driver's license issued from any state in the United States allows you to drive anywhere in the U.S. and Canada.