I'm not from Europe so I don't know if this has been changed in the past few years, but I know when I started adsense in 2011, people from Europe said the PIN postcard was sent from the US. Maybe someone else will give you up-to-date info though. If you're asking because you're wondering how long it will take, it can take anywhere from 2-6 weeks to receive it, so don't worry if it doesn't come quickly.

I applied for adsense on Dec 7th 2015 and received mine on Thursday 7th January 2016.
I reside in the caribbean & it came from the US

I have already requested for two times in last 4 months but still I have not got any. My ads have stopped showing. I am seriously upset with the Indian postal service. I am now worried I may lose my AdSense account. Tomorrow I will request for a new pin .

That sucks! Do all / most Indians have this problem?