what is eu, eea or ch citizen
a Citizen of the EU is a citizen of a country of an EU member state. The EEA (European Economic Area) includes the countries of EU members states and other European countries which are not part of the EU such as Norway & Iceland. http://en.wikipedia.org/wiki/European_Ec...
Maybe a mistake in typing, but Switzerland is not formally part of EEA. However, it is true that Switzerland, Iceland, Norway and Liechtenstein form the EFTA (European Free Trade Area). CH stands for Confederatio Helveticae which is latin for 'The swiss confedation (note the plural use of the word Swiss).