You can make your HDFC Bank overdue loan payments from any bank account via BillDesk. Firstly, you would have to provide your bank loan details. Enter your HDFC Bank overdue loan account number and your date of birth. Then you would have to pick your net banker from the drop down and click on PAY. You will be redirected to the bank payment interface of your chosen net banking option. 

You would have to confirm payments by entering your authentication details by entering your user id/password. Confirm your payment that you have made towards your HDFC Bank personal loan account. Your account will then get debited online. You will  get an online transaction confirmation and a Transaction Reference Number.