For those who have sent more than 4 pins and are yet to receive any, here is the link you can use to verify your AdSense without pin
For your account to be Eligible you need to have exhausted all your pin request, And it has also reached 30 days since you sent the last pin.
1. Make sure you are logged in on a browser.
2. Paste the following url in the address bar
3. Fill your name as it appears on the account.
4. Fill your publisher ID.
5. Upload your well snapped or scanned valid ID.
NOTE: you must use the same Id used during identify verification.
You account would be verified within 30 minutes.