nihangshah is right buddy . After $10 you will get one pin number via mail service and then you have to enter that pin number to verify your home address . After this verification you will receive adsense checks .
Don't worry your pin is not important until you reach $100. If you have reached $15 you will get an email telling you that your pin is being sent to you via snail mail and once you get it you need to enter into your info on Adsense. Remember however you will not recieve a payment until you have reached $100. Visit www.SimpleAdsense to learn EVERYTHNG you need to know about making money with Google Adsense