A business letter of responsibility is required, to be typewritten on your company letterhead and addressed to:
Embassy of Russia, Visa Section, Washington DC
The letter must explain all of the following:
Nature of business to be performed
Name and address of reference to be visited
This letter should request Multiple Entries visa if required
Guarantee of return transportation and sufficient funds for the visit
The letter should be signed by an officer of the company other than the applicant.
Invitation Letter
Original of government approved invitation from the Russian sponsor. Invite must be issued by the Russian Ministry of Foreign Affairs in the city of your planned visit. This must contain the government seal and reference numbers. Invite will specify single, double or multiple entry.