Single-entry and double-entry Business/Humanitarian  Visas are issued for a period no longer than 90 days. Multiple-entry Business/Humanitarian  Visa is issued for up to 1 year. Please note, that multiple-entry visa permits  the holder to stay at the territory   of Russia no more than 90  days in every 180 days

• 1 Application form completed and signed by applicant with 1 photo (35mm X 45mm, color) glued to the form. NOTE! Incomplete visa application may result in rejection of documents. 
• Valid Passport (only in original and valid for at least six months after the last day of the intended stay in Russia). NOTE! Non-south african nationals must submit valid Residence Permit (Work Permit) in RSA or copy of RSA ID (RSA passport). 
• The original invitation issued by the Ministry of Foreign Affairs of Russia or the Federal Migration Service of Russia must be submitted to the Embassy's disposal. NOTE! Only original invitation is accepted when lodging a visa application. A telex confirmation from the Ministry of Foreign Affairs of Russia going directly to the Consular Office is also acceptable. (Sample of an invitation issued by the Federal Migration Service of Russia)
• Medical (Travel) insurance for the period of stay in Russia.