I got it from here http://best-tips-adsense.blogspot.com/ you can find it here to make sure . https://www.google.com/adsense/support/bin/answer.py?answer=63513&sourceid=aso&subid=ww-ww-et-asui&medium=link
I would still prefer checks for there is no fee in cashing out...western union delivery is expensive..
For big amounts (like $100+ a day) with adsense, WU is my choice. They will charge me for such transactions (not with adsense) only $100 which %3. Comparing this with waiting for check and all that trouble...%)
here a clue i guess that it might exist already https://www.google.com/adsense/support/bin/answer.py?hl=en&answer=63513