After you have registered on Chillr with your HDFC Bank account you have to generate an M-PIN. M-PIN generation is a one time activity. Once M-PIN is generated and sent to you by the bank, you have to change your M-PIN to a 4 digit M-PIN of your choice. M-PIN is used to authenticate every transaction you make through Chillr. M-PIN is a secret PIN, please do not share it. 

To generate your M-PIN, please follow the steps below :

Process 1 : Through NetBanking

Step 1 : Log in to HDFC Bank NetBanking 

Step 2 : Selects Requests and scroll down

Step 3 : Select Generate mPIN

Step 4 : Your M-PIN will be sent to your registered mobile number and Email ID

Process 2 : Through MobileBanking

Step 1: Go to "Accounts" & press "Generate MPIN".

Step 2: Select the account for which you want to generate MPIN.

Step 3: Press “Confirm" after checking all the details.

You will receive your MPIN via SMS on your registered mobile number.