Given a travel related situation, and given a specific question about the situation, summarize the question into a title

[EX Q]: Someone I know is a Swedish-South African citizen, and has a Swedish ID card and a South African passport.

He's going on the Allegro train Helsinki-St Petersburg (and back), and his documents, combined, are sufficient for this trip (Swedes have freedom of movement in Finland, while South Africans are visa-free for Russia for 90 days).

The problem is: when booking the ticket online, you have to enter document info to be transmitted to the Rajavartiolaitos and the FSB, and the system only lets you put one document per direction.

So the question is: should the person put the document to be used at Finnish, or Russian, border control?

Does it differ in each direction?

I e-mailed and called VR (Finland's railway operator), but they were completely bamboozled and ignorant about the situation, and thus of no help (they said "put in the document to be used during the journey")

Also e-mailed the Rajavartiolaitos head office, in Swedish followed by English, but haven't received a reply thus far. Would write to the FSB St Petersburg division as well, but my Russian is too poor and I doubt they'll reply to a message in English.

[EX A]: What travel document should a dual national register when booking the Helsinki-St Petersburg train?

[EX Q]: I live in USA but I'm traveling to Poland for the summer. I am wondering what are the prices in USD of coffee in Poland.

[EX A]: What are the prices of coffee in Poland compared to USA

[EX Q]: Next Thursday near 9 AM, I might have to take a cab from La Défense metro station to go to a district which is outside the subway zone.

According to this PDF file (in French) about Paris La Défense (page 4) and this map, there is a taxi station at La Défense not far from the metro station.

Google Street View shows the station, and there are five taxi cabs waiting, but there are only one cab from another point of view. The other lane is empty. This is scary.

Are there cabs available all the time there, or do I have to book a taxi before arriving at La Défense? If I have to book it, is it better to do it a few minutes before arriving, or should I do it the day before my trip?



After being at La Défense for five consecutive times near 9 AM and 9:30 AM, I confirm that there were always a lot of cabs available (always at least five, often more). I believe that this was also the case near 4 PM. Of course, the situation may be different on weekends.

[EX A]:
Do I need to book a taxi before arriving at Paris La Défense?