sentences:  It was also used extensively for online identification purposes, but after 2013 resident registration number cannot be used for identification unless other laws require processing resident registration numbers.Foreigners (except those affiliated with the U.S. military) receive an alien registration number upon registration with a city office, which serves as a substitute for the "resident" registration number on their alien registration card.Every South Korean citizen within a month of their 17th birthday registers their fingerprint at the government local office and is issued the Resident Registration Card that contains their name, registration number, home address, fingerprint and picture.