I stay in Amsterdam in a work permit. My boyfriend applied for a visitor visa to Amsterdam. I gave an invitation letter from the Amsterdam Municipality for accommodation and sponsorship. In his initial application, he applied for a single entry visa for 9 days.
He got his Schengen visa approved from 6th July to 20th August for a maximum stay duration of 30 days. It is a single entry visa.
I have three doubts which needs clarification from you.
1) Since he got his visa for 30 days now, can he extend his duration of stay? (Say from 9 days to 20 days)
2) Can we travel in visitor visa to other schengen countries like Switzerland and Rome (We mentioned in itinerary only Amsterdam)?
3) He has a stopover in Germany during his onward flight. Does that mean his immigration will happen in Germany? If so, will it create any problems?