Is it necessary to fill out RuID when transiting through the airport

Question

If I am flying in transit and only changing planes at the airport, is it mandatory to fill out the RuID form?

Answer

If this is a regular transit through the airport without exiting to the city and without going through a full entry into Russia, RuID is usually not required.

If the route involves exiting the transit zone, collecting luggage, changing airports, or actual entry into Russia, it is better to check the requirements based on your citizenship and route in advance.