Editing National identification number (section)

=== Slovakia ===
In [[Slovakia]] there are two kinds of National identification numbers. The first one is the ''Birth Number'' ({{langx|sk|rodné číslo (RČ)}}), issued at birth by the civic records authority ({{langx|sk|links=no|matrika}}) and recorded on the birth certificate. Its format is YYMMDD/XXXX with YYMMDD being the date of birth and XXXX being a semi-unique identifier. For females, the month of the date of birth is advanced by 50. Full identification number in the form YYMMDDXXXX must be divisible by 11. Since this system does not provide a truly unique identifier (the numbers are repeated every century) and contains what might be considered private information, it may be updated in the future.

The second system is the ''Citizen's Identification Card Number'' ({{langx|sk|Číslo občianskeho preukazu (ČOP)}}) which is in the form AA XXXXXX (A-alphabetic, X-numeric) and is used on [[Slovak identity card]]s. Identification Cards are issued by the state authority ([[Law enforcement in Slovakia|police]]) for every citizen who reaches 15 years of age. In contrast to the Birth Number, this identifier can change over the citizen's lifetime if a new ID card is issued, for reasons such as expiration, loss or change of residence. The ID number is used, among other things, for voter registration (because of the domicile record verification provided by the ID). A similar system, with both types of identification numbers, is used in the [[Czech Republic]].