Visit any HDFC Bank ATM
Insert your HDFC debit card
Select your preferred language
Enter your current ATM PIN
Choose the option for PIN generation or PIN change
Select debit card PIN services
Enter the OTP received on your registered mobile number, if prompted
Set your new ATM PIN
Re-enter the new PIN to confirm
Complete the transaction and collect your card
If you do not remember your current PIN, use HDFC NetBanking, MobileBanking, or contact HDFC customer care to generate a new PIN