The story:
One night in mid-october, I thought that eventually, perhaps, sometimes, I had to take a short look at my actual passport...
and: the expiry date was 5.5.2015... no problem BUT: The Thai border authority requires at least 6 month of validity at the entering day :-(((((
So, next day, a walk to the office and they told me that it would last four weeks, therefore, I was until today a little bit nervous ;-))