Editing National identification number (section)

=== Latvia ===
In [[Latvia]] the Personal Code ({{langx|lv|personas kods}}) consists of 11 digits in form DDMMYY-XNNNZ where the first six digits are person's date of birth, the next one stands for a century person was born in (0 for 19. (1800–1899), 1 for 20. (1900–1999) and 2 for 21. (2000–2099)), NNN is birth serial number in that day, and Z is checksum digit calculated in a way that modulo validation formula is equals to Z.<ref>Information by Krabat Service</ref>

Given the input in the following format ABCDEF-XGHIZ, Validation formula is Z must equal to (1101-(1*A+6*B+3*C+7*D+9*E+10*F+5*X+8*G+4*H+2*I)) | Mod 11 | Mod 10.

From 1 July 2017, Personal Codes are issued without indication to date of birth.<ref>{{cite web|url=https://likumi.lv/doc.php?id=278984|title=Grozījumi Iedzīvotāju reģistra likumā|website=LIKUMI.LV|access-date=2020-12-23|archive-date=2021-04-22|archive-url=https://web.archive.org/web/20210422112223/https://likumi.lv/doc.php?id=278984|url-status=live}}</ref> Personal code starts with digits "32" to distinguish new and old format.