個人情報漏洩
Identity theft and other fraud is difficult to defeat in Korea, because each person's RRN is unchangeable, unlike other nation's identification numbers which can be changed if they are compromised (such as the United States' SSN). Complaints about identity theft led the South Korean government to implement stiff penalties for using someone else's resident registration number. Offenders may serve three years in jail or pay a ₩10,000,000 fine.