Besides the visa support documents we will send you which consist of the hotel accommodation voucher and the invitation letter, you will need to print out the fulfilled application forms, 2 recent photos, your valid passport in original, medical insurance policy valid in Russia and recognized by Russian Consulate. The Consulate/Visa Center in some cases may require also the employment certificate, the credibility confirmation documents – please consult with the specific Consulate you are going to apply to.