Individual insurance account number (SNILS) is a number issued and used by the Pension Fund of the Russian Federation to residents of Russia for the purpose of tracking their social security accounts.
SNILS is required for the Pension Fund of the Russian Federation to organize personal information about an employee and the amounts contributed by an employer to an employee's individual retirement account in respect of a future pension.
SNILS is used universally as a primary personal number within the Government of Russia.
Anyone residing in Russia on a permanent basis may apply for a number and an application can also be filed on behalf of a child at birth.
SNILS format is "123-456-789 12" where the first 9 characters can be any digits and the final two are a checksum.