https://ru.ivisa.com/russia-invitation-letter Keeping in mind there are as many means to do business because there are countries to work with, here are a couple of tips for minding your global P's and Q's. If you get a commercial aim of your visit, e.g. you want negotiations or planning to get involved in an exhibition or conference, you are in need of a business visa. Knowing why you've been invited is essential for the subsequent 2 reasons.