I just got this in my email, so sharing

Please check & confirm

Dear All,
Kindly make a note of this and forward to all concerned.

If your passport is of Z series. (Passport number starts with Z). If your
passport is in the serial number from Z000001 to Z073000
You need to submit your Passport to the Passport office for the
cancellation.
For this following procedure need to be undertaken:


Log on to http://www.passport.gov.in" rel="nofollow">LINK
Fill up online form
Submit your original passport along with online filled up form and address
proof

This news is from Times of India.

http://timesofindia.indiatimes.com/Government_withdraws_46000_Z-series_pas
sports/articleshow/3007718.cms


Passport office will return your new passports within a week or two. All
this needs to be done on urgent basis