Analysis of an ID number

An identity number consists of 13 digits, which are compiled as follows:

1 2 3 4 5 6 7 8 9 10 11 12 13
of which -

(a) the first six digits represent the date of birth of the person as follows:
Digits 1 and 2, the year of birth; digits 3 and 4, the month of birth; and digits 5 and 6, the day of birth;

(b) digit 7 indicates the gender of the person, namely the serial numbers 0 to 4, which are allocated to female persons, and serial numbers 5 to 9, which are allocated to male persons;

(c) digits 8 to 10, inclusive, represent a serial number;

(d) digit 11 represents the citizenship of the person as follows:
SA Citizen - 0 Non SA Citizen 1

(e) digit 12 represents the index number 8 under which the person's particulars have been included in the population register; and

(f) digit 13 is a control figure determined by the computer.

Republished with permission from SA Deeds Journal