I encountered a problem earlier on when I tried to key in the PIN number I received into the Adsense system. I tried it today and it works. Here is a chronology of what happened.
I received a letter from Google a few days ago. It looks like a self printed “letter-card” type of thing by Google and was folded in half. I was actually a little surprised and disappointed with it. I thought that they would at least send it in an envelope or something.
The back of the card was printed with the Google logo.
The funny thing is that the front of the card was printed with the text “Important Account Information Enclosed” but the card was only “sealed” with small round tapes at all three ends. Anyone could have taken a peak by looking through the gab in between each tape.
The above is the content of the card. There are some instructions on where you can insert the PIN (you should already know where by now). The most important part is the PIN number.
Everything is ok when you get the screenshot above.