In general you have the right to stay in all EEA countries, no matter how long. However some countries ask you to report your stay, even if it is **shorter than 3 months**. As a general rule in the EU the same requirements apply to citizens of that countries as well.

These countries according to the [EU job mobility portal][1] are:

 - **[Belgium][2]** You are required to report your presence within 10 working days at the local town hall.
 - **[Czech republic][3]** You are required to report you stay within 30 days of arrival.
 - **[Germany][4]** You are required to report your non-touristic stay within around 1 week after arrival at the local *Meldebehörde*. The exact details varies by state and can normally be found on the cities' website.
 - **[Slovakia][5]** Your are required to report your stay within 15 days, even if staying with friends.
 - **[Switzerland][6]** You must register within 14 days. Note that Switzerland may be additional restrictions in the near future.

Although it is not explicitly stated on the site, you don't need to report your stay in [Denmark][7].

Sometimes it may be beneficial to register your stay even if it is short than three months (for example if you want to work or open a bank account).

Please not that these are just formalities and the countries are required by EU law to issue all documents and can only be refused in some serious cases (such as imminent danger for national safety or health).

For stays **longer than three months** almost all member states require registration and some sort of documentation, sometimes even just after arrival if you intent to stay longer.

In general you cannot be expelled for not following those rules, but fines can be imposed.


  [1]: https://ec.europa.eu/eures/main.jsp?acro=living&lang=en&parentId=0
  [2]: https://ec.europa.eu/eures/main.jsp?catId=8096&acro=living&lang=en&parentId=7736&countryId=BE&living=
  [3]: https://ec.europa.eu/eures/main.jsp?catId=8100&acro=living&lang=en&parentId=7740&countryId=CZ&living=
  [4]: http://europa.eu/youreurope/citizens/residence/documents-formalities/reporting-presence/germany/index_en.htm
  [5]: https://ec.europa.eu/eures/main.jsp?catId=8121&acro=living&lang=en&parentId=7761&countryId=SK&living=
  [6]: https://ec.europa.eu/eures/main.jsp?catId=8125&acro=living&lang=en&parentId=7765&countryId=CH&living=
  [7]: http://www.statsforvaltningen.dk/site.aspx?p=6394