This information only for google adsense publisher , I think you got same problem with me before . Cannot track your check at Dhl website because you cannot find tracking number in your adsense account , and usualy this tracking number appear after you receive your check. You  only can see  payment number in  payment history, and now you  use this to track your  adsence check, not need tracking number

Follow this steps :

1. Login to your adsense account

2. Click My Account - Payment History and and click payment details this month

3. copy payment number

4. open DHL website ( www.Dhl.com )

5. At left menu click More Tracking Options

6. and then click Access DHL Tracking by Shipper’s Reference

7. paste your payment number to  Shipper’s Reference Box and choose date range ,  choose your country for destination.

8. and then.. you can seee.. your check on the way

Yesterday Google posted new  image placement a policy  for adsense publisher.  This statment released via official adsense blog   , and the point is you cannot place associated images  near adsense ads associated.  Example, if your site topic about dog  you cannot  place  dog  images near your adsense ads, even if you place a small space or a line between the images and ads, this is not allowed. Try using non related images with dog topic.

for full policy you can read it here , official adsense blog