I don't think that problem is unique to Stockholm, plenty of other cities have that issue. Usually when I go to a new location, doing a Google search or two on

I don't think that problem is unique to Stockholm, plenty of other cities have that issue. Usually when I go to a new location, doing a Google search or two on these things proves helpful. The number plate stuff is on wikipedia and the VisitStockholm.com website for example: http://www.visitstockholm.com/en/Good-to-know/Getting-around/ http://www.visitstockholm.com/en/Good-to-know/Getting-around... has all the information on taxi's, how to recognise them, what the regulations around them are and other methods of getting around. A little bit of research upfront can spare you many unpleasant experiences no matter where you're going and regardless of if you know a local or not.