I'm traveling to the FIFA World Cup this summer and there was a question that came up after buying train tickets. For my USA passport I used the suffix in my name, "Jr" for Junior. But my train tickets have the correct surname and first name, but not my suffix. I didn't place one because on the online site (rzd.ru) it didn't have an option for one.
Would this be a problem or do they understand that many of the international travelers coming in for the World Cup may have non-standard names where their tickets may not exactly match their passport?