Isn't this the Swiss form? http://www.estv.admin.ch/bundessteue...prungmarke1_17
FWIW (although only relevant to the original 2011 query) my "Basic PAYE Tools" software from HMRC says: "You must give a P60 End of Year Certificate to every employee who was in your employment on the 5 April, when the tax year ends. You must give them that P60 on or before the 31 May."
Oddly, since I deal with such documents for a number of countries, the Swiss instructions don't seem to show the deadline date for filing the document and presenting a copy to each employee.