unique identifying code

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A systematic method of assigning numerical codes to individuals for such purposes as identity cards, income tax records, or driver's licenses. Nations such as Sweden that use a unique identifying code generally base it on a sequence of digits for birth date, birth place (with postal code or administrative jurisdiction code), sex, first and last birth names of the mother or father, and additional digits or alphabet letters to ensure separate identification of individuals from twin or multiple births. Unique identifying numbers or a system for uniquely identifying individuals are a prerequisite for record linkage.

Subjects: Public Health and Epidemiology.

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