FinTech - Payment Gateway Models and Strategies

Identify the parties in a payment gateway transaction, including the customer, online merchant, acquiring bank, card schemes, switches, issuer or entity, the PSP, and note security certifications and ISO standards.

Explore the four building blocks of digital payments, including card-present and card-not-present transactions, and how issuer and acquiring banks and card schemes route payments, pricing, and chargebacks.

Describe the transaction flow in a payment gateway for e-commerce, outlining the three layers (presentation, application, database) and the roles of acquiring banks, switch, and issuer banks.

Five payment gateway integration models: proprietary or custom carts; merchant managed carts; third party manages payments on the merchant site; third party with inline frames; third party hosted pages.

Explore proprietary or custom developed payment integrations that run the entire checkout within the merchant environment, encrypt customer and payment data, and communicate with the payment gateway.

The merchant-managed model routes cardholder data directly to the payment gateway, keeping card data out of the merchant system and using a unique reference or token to confirm transactions.

Explore the third party with direct post model, where cardholder data goes to a middleman provider; merchants keep customer details, and the provider forwards to payment gateway and reports results.

Explore how third-party inline frames embed a payment gateway on a merchant site, letting a service provider handle customer data entry and processing within the iframe.

Understand how a third-party hosted payment page operates, routing payment details through a service provider and a secured API. Learn how SMS links enable delayed or cash-on-delivery payments.

Explore the differences between chargebacks and refunds in fintech payments, including who initiates each, the roles of banks and merchants, and how friendly fraud is handled.

Explore processing, clearing, and settlement in digital payments, detailing how authentication, authorization, and verification flow into fund transfers, ledger reconciliation, and liquidity management for merchants.

Understand the fund settlement flow among issuer, acquirer, and card schemes, including net versus gross payouts, disputes, and daily settlement options for merchants.

Identify critical evaluation factors for choosing a payment gateway, including uptime, security certifications, settlement timelines, merchant discount rates, payment tools, platform compatibility, refund processes, and responsive support.

Identify risks in payment gateway operations, including data breaches, partial encryption, and weak authentication. Mitigate them with full encryption, two-factor authentication, and multiple gateways to reduce fraud, chargebacks, and downtime.

Learn how verified by Visa and MasterCard secure code protect online payments and reduce fraud in card-not-present transactions. Understand the three domains—issuer, acquirer, and interoperable infrastructure—that support secure digital payments.

Explore pricing strategies for payment gateways, multi-bank routing with acquiring banks, and MDR, and learn how volumes and merchant category codes influence negotiations and settlements.