Is it true that conductors (meaning train staff, NOT border police) on the Tajik train from Moscow to Dushanbe (which I'm going to take to Kazakhstan) check if you have the proper visa for the destination? According to the RZD Website, Russian conductors don't have the authority, but this is a Tajik-operated train.
I've heard that many conductors assume any non-CIS national needs a visa.
If they do check, I know I need to print out official info in Russian stating that I don't need a visa for Kazakhstan.