From 1 June 2009 any visa or passport is necessary; the identity card is sufficient.
No. To work in Switzerland you need permission from the Swiss authorities.
Yellow Card - 2000 is rated/received certificates of: Switzerland:10 (canton of Geneva) Switzerland:10 (canton of Vaud)
You need a passport or an identity card (for EU citizens).
Yes, it is possible.
With the Romanian identity card; also possible with a passport.
You can enter in Romania only with a valid Belgian passport or a valid Belgian identification card.
Not if you are a citizen of an EU or Schengen Area country which issues national identity cards, then you can enter Switzerland using that identity card. Otherwise you need a passport. If you are entering Switzerland via the land borders there are not normally any passport / ID card checks, as Switzerland and all countries bordering it are members of the Schengen Area. But you still need to carry your passport or ID card as this is a legal requirement in Switzerland, and you might be unlucky and get asked to show it at the border.
No, you need a valid passport.
An identity card is sufficient.
after a red card to Switzerland the score finished at Chile 1-0 swizerland
An identity card is sufficient for a Romanian citizen.
For a Greek citizen: identity card or passport.