One of the first orders of business you will take care of when you arrive at your overseas assignment is to get your ID card. This card is required to get you on post, into the Commissary and Exchange, pick up and mail packages at the post office, and for numerous other day-to-day tasks. Civilian employees and their authorized family members (aged 10 and older) receive an ID card different from what you may have had in the United States. All members of your family should carry their ID cards wherever they go.