sentences:  Russian citizens must use their Russian passports when leaving or entering Russia, unless traveling to/from a country where the Russian internal ID is recognised as a valid travel document.After the breakup of the Soviet Union in 1991, the Soviet Union passport continued to be issued until 1997 with a validity of 5 years, when the first modern Russian passport are known to be issued.The first version of passports issued in 1997 was handwritten.