For express delivery (secure delivery) adsense used to deduct 25$ from publisher earning.
From Google Adsense help:
AdSense publishers in India will receive standard delivery checks mailed via the local courier service Blue Dart for no additional charge. Checks mailed by Blue Dart should arrive within 10-30 days of the check date.
Tracking numbers may be available for Blue Dart payments. You can check to see if one is available by by clicking any Payment link in your Payment History page. Blue Dart tracking numbers will typically be visible by the 15th of any month and can be tracked on BlueDart's website.