Nintendo of America has launched the eligibility-check page for the Nintendo 3DS Ambassador Program. If you are not sure if you are, in fact, part of the program, this is the way to check. Just enter your 3DS serial number in the box. You will find your number on the back of your 3DS. It starts with “CW” and is followed by nine digits.
Please note this is simply a secondary check, as Ambassadors should have already received a welcome message on their 3DS. If that did not happen, or you just want to make sure, this eligibility-check page is for you.