Does anyone know if you have to have a round trip ticket to enter Spain? Or can I buy a return ticket once I am there. I do not have permission to stay longer than 3 months.

search the old posts, you should find the answer there.

I'm flying from New York to Madrid in September with a connection in Zurich, Switzerland with a one way ticket. I've arrived in Madrid before with just a one way ticket without any problems, but I don't know if it'll be a problem in Zurich. I've heard that in some countries such as England they make you buy a return ticket right away if you don't have one, and I'm hoping this is not the case in Switzerland. Has anyone ever flown into Zurich with a one way ticket or does anyone have any information about this? Thanks!

When I travelled to Madrid last year I flew with Air France, the plane went to Paris where I had to make a transfer to Madrid. In Paris airport they checked my passport and as I was in the European Community there were no necessity to check my passport again in Madrid airport, so I left the plane and went direct to the street.
and they do not put anything on my passport. I could stay in Spain one year and nobody new.
and how do you say that you only can stay 3 months in Spain?,

Rafael