In each state, sooner or later, the government was puzzled by the problem of registering its citizens, and began to issue them official documents for identification. The first such documents were a simple reference, on which in addition to the name, surname, type of activity and description of appearance, there was a registration number - a kind of passport series by which you could find an account in the registration book. But in the mid-19th century, passports were massively canceled - this was due to the development of railway transport, because of which it became difficult to track the movement of people. But the outbreak of World War I again served as the impetus for the introduction of official documents.

Currently, a mandatory document for all citizens of the Russian Federation is a passport, the series and number of which are used to identify a person in all existing databases. No other document can serve as a complete replacement for a passport, it must be received by all people who have reached the age of 14.
An identity document is issued at the departments of the Department of Internal Affairs or the
FMS of Russia, while the passport indicates the place of permanent residence - region, territory, republic or region. A series of passports corresponds to the code assigned to the corresponding subject of the Russian Federation, therefore the first two digits indicate the area of residence. The second two digits indicate the year the document was issued, and the next six-digit number is a serial number.
In the USSR, a unified passport system was introduced in 1933, while residents of rural areas were not issued a passport in their hands until 1974. In Soviet official documents, a series of passports was designated differently - the designation of the letters of the Russian alphabet and Roman numbers was used. Roman numerals indicated the sequence of issuing official documents, and the letters, in turn, corresponded to the region or region: In Moscow, passports were issued with the letters MJ and SB, in Kirov IR, in Krasnodar AG, etc.
It is interesting that at present the series of passports is determined by the OKATO directory, which does not correspond to its analogue of the traffic police. If you suddenly noticed a mismatch of your document with the region code or the year of issue, this does not mean that the passport is fake. It’s just that in 1997 there was a release of books on a special circulation in which a series of passports was replaced by the established numbers, their own for each region.
Citizens of other countries have passport numbers — they do not contain a series as such, but there is a long number with alphabetic (Latin alphabet) and numeric characters. In this connection, when registering certain documents in our country, they have problems - the forms contain the required column “passport series”.
It must be remembered that the series and passport number are confidential and are not subject to disclosure. Therefore, you should not tell everyone your passport data, all the more so publish it in the public domain, a passport or a copy of it can be presented only in official institutions, such as banks, police stations, personnel offices, etc.