Registering your arrival :
Poland
Registering your arrival
As an EU national you do not need a work permit to work in Poland. However it is always best to be prepared, and have employment set up before you go. You are able to enter the country as a tourist and to look for a job once you arrive.
As an EU Citizen, you are entitled to stay freely in Poland for up to 3 months. If you plan on staying longer than this or working, you must apply for a residence card (Karta pobytu obywatela UE). This can be obtained from you local council offices in the town/village you live in.
Ministry of Foreign Affairs - Citizens of EU traveling ot Poland
Legalization of Stay - Instructions to EU Members