What is “visa invitation” (“invitation letter”)?
This general term denotes a set of documents that your Russian host (e.g. a relative, a business partner, or a travel agent) must furnish you with, so that you could apply for a Russian visa at the Russian Consulate servicing your area. If you did not receive any documents from your inviting party, do not send your visa application to the Consulate – it will be refused. In case of the tourist visa, an invitation consists of two documents: a tourist confirmation bearing your personal details and a travel voucher mentioning the details of your Russian trip (cities visited, types of services ordered, etc.).