I had participated in Indian Puzzle Championship 2015, but have not received the participation certificate.
Could you please mail it to my registered id?

Also, can I still make a request for Hard Copy of the certificate, though the last date is over?

Hi. The participation certificates for the Indian Puzzle Championship has not been sent out yet via e-mail. You will receive a mail with the e-certificate and the instructions for obtaining the hard certificate in the next few days. You can reply to the mail with the request for the hard copy.

To add to what Varun said, since the delay for the certificates is on our side and not yours, you will be given 2 weeks after the mail is sent to request for hard copy. We will send it soon. Apologies for the delay, we have been more focused on getting the first Sudoku Mahabharat and Puzzle Ramayan rounds ready.

I did not participate in IPC 2015. I downloaded the puzzle booklet for solving. But it's asking for the password which is not in http://logicmastersindia.com/lmitests/?test=IPC2015 . Can anyone share the password?
@Admins: please post the password there or add the booklet without password.

Added the password there.

We are supposed to remove the password and append the solutions. We will do that soon.

Solutions posted
http://logicmastersindia.com/lmitests/?test=IPC2015

An email has been sent to all (Indian) participants with your e-certificates. Please reply to it if you want a hard copy, with the necessary details requested in the mail.

How could I participate in championship

The 2015 edition is over of course, but there is an ongoing qualification process for the finals of the 2016 edition, known as Puzzle Ramayan. Look at the schedule here - http://logicmastersindia.com/PR/2015-16pr.asp .
Note those dates and participate in those on this site. Refer to this page for details on how to participate - http://logicmastersindia.com/forum/forums/thread-view.asp?tid=381

Is this championship different from the National Sudoku Championship? And if this is different, then when is it due in 2016 and the process for the same. Thanks.

It is different, and it is done for this year, on 17th of July, in Chennai. However if you keep track of the forum you should be able to see more contests both in puzzles and Sudoku. The past content of Indian Puzzle Championship is available for free here - http://logicmastersindia.com/lmitests/downloads.asp?testType=99 . This year's content isn't public and is on sale. Check here for details - http://logicmastersindia.com/forum/forums/thread-view.asp?tid=1014&...