How can I request a new PIN?

people you can request up to two additional PINs. you'll need to wait 3 weeks after your last PIN was mailed before requesting a new one.
To request a new PIN follow these steps:
1.Go to https://www.google.com/adsense/
2.Log in to your AdSense account here.
3.Click the My Account tab
4.Continue to the Payment History page
5.Click the Please enter your PIN link
6.Click Request a new PIN
then google will mail you new PIN.