# Cascading Transactions

The Tieto E-commerce Payment Gateway (EGW) provides a Cascading mechanism that ensures maximum transaction reliability by automatically retrying failed payments through alternate processors or payment methods. While traditionally considered a failover tool, Cascading is also a merchant-facing business feature that improves conversion rates, optimizes cost strategies, and enhances the payment experience.

[Cascading vs. Smart Routing](https://doc.ecomm.api.tietoevry.com/features/payment-reliability)

## Configuration Options

EGW supports both platform-level cascading logic and merchant-level preferences through the Merchant Portal and Admin Portal.

<table><thead><tr><th width="271">Setting</th><th>Description</th></tr></thead><tbody><tr><td>Retry Priority Matrix</td><td>Define fallback processors for each method</td></tr><tr><td>Merchant Preferences</td><td>Merchants can set acquirer order or fallback methods (subject to bank policy)</td></tr><tr><td>Retry Limits</td><td>Limit the number of attempts per transaction</td></tr><tr><td>Error Type Filters</td><td>Define which error types trigger retries</td></tr><tr><td>Cross-Method Permission</td><td>Enable fallback across methods (e.g., Card → A2A)</td></tr><tr><td>Queuing Logic</td><td>Optionally delay and retry later for certain failures</td></tr></tbody></table>

## Visibility & Reporting

* Bank (EGW Owner) can monitor all retry paths, failure reasons, and routing decisions
* Merchants have access to retry logs, outcomes, and payment method fallback stats
* Auditors can access a complete event trail with digital signatures and timestamps

## Business Value for Merchants

* Maximizes successful transactions through automatic recovery
* Improves customer experience by reducing checkout friction
* Reduces operational cost through smart acquirer prioritization
* Supports business logic for retry strategies by channel, geography, or value
* Enhances transparency into payment success and fallback behavior