I’ve got Adsense PIN (Personal Identification Number) from Google via standard mail in last February 21st. It took 30 days to get that mail from the date of email from Adsense. Now I keep this mail for the remembrance.
Adsense PIN Mail (Back Side)
Adsense PIN Mail (Front Side)
Adsense PIN Mail (inside)
You’ll receive Adsense PIN Number when your earning reaches US $10 (last time was $50, Google just changed the policy in last month) for the first time. Once your received you’ll have to enter the PIN number from the mail. After that you’ll become eligible to receive payments. To learn more about Adsense PIN