Transactional flows

Tanisha Sabherwal
July 23, 2021
- Cards (Credit/Debit/Prepaid)
- Customer enters card details and initiates the transaction via the Payment aggregator.
- The card details are matched with the VISA/Mastercard directory and the Access Control Server(ACS) page of issuing bank is opened.
- The ACS page will trigger an OTP for authentication to be entered by the user.
- The issuing bank validates all the details including card number, CVV, expiry date, available balance/credit on the card.
- Lastly, all the stakeholders are informed about the successful transaction and process of fund movement(settlement) commences.
There are two variations of the same:
- Off-us: When the issuing and acquiring banks are different.
- On-us: When the issuing and acquiring banks are same and hence, the directory lookup step is skipped.
Transactional flow via Cards
- Transaction done via without redirecting to ACS of issuing bank
This process is two folds:
- Merchants triggers OTP via PA/acquiring bank to authenticate the transaction.
- Customer receives the OTP and is validated when the PA makes the second API call.
Transactional flow via Direct OTP
- Net-banking
This is pretty straightforward. The customer is redirected to the bank's online netbanking page to authenticate and complete the transaction.
A Net-banking Third-Party Validation(TPV) flow is similar to regular net-banking except the account details are matched against the ones saved with the merchant.
Transactional flow via Netbanking
Resources: PDCFlow, AuthNCapture