National Insurance number
The National Insurance number is used as a reference number in the Pay As You Earn system, and also by the self-employed. It is also used in applications for Individual Savings Accounts (ISAs), to check that an individual has opened only one ISA in a tax year.
International Social Security Association
The ISSA publishes a quarterly journal in the social security field, the International Social Security Review in English, in collaboration with Wiley-Blackwell Publishing. The ISSA's periodic series "Developments and Trends" and "Social Policy Highlight" disseminate new findings on social security policy and practice internationally. It co-publishes the series "Social Security Programs Throughout the World", in co-operation with the [ United States Social Security Administration]]] In partnership with the OECD and the International Organisation of Pension Supervisors (IOPS), the ISSA produces "Complementary and Private Pensions Throughout the World". The ISSA also issues an electronic newsletter; social security policy briefs; analytical reports on specific topics; and a range of thematic technical reports. The ISSA provides comprehensive data on various aspects of social security including: an overview of social security systems worldwide; a monitor of social security reforms; summaries of complementary and private pension systems; social security legislation; a comprehensive bibliography; and a thesaurus of social security terminology. Databases are available via the ISSA Web portal.