I have a Schengen visa that has a 90 days validity and will be expiring by the 25th of February, 2015. I got an Internship and thought I could renew or extend my visa from here (Geneva) but was told that I have to go back to my country (Nigeria) for a new visa. The visa procedure takes a month and there is a conference that I would like to attend by March which means if I should go back end of this month, I may not make it to the conference due to the long application period. Is there any way possible for me to have the extension here until March?
There are a couple of possible scenarios:
Your visa expires on February 25th but you haven't used up your 90 days. You can either extend your visa or get a new one to come back to the Schengen area but you will probably need to return to Nigeria for that as visa extensions are only intended for “serious personal reasons”.
Come February 25th, you will have stayed 90 days in the Schengen area. You will not be able to get another Schengen short stay visa, even if you go back to Nigeria to apply for it. You need to leave as soon as possible to avoid falling foul of the maximum stay rules or secure another type of visa from the Swiss authorities.