Gateway Release V5.29

The release notes contained in this document will be applied on the Gateway and will be in effect as of July 2026.

Production Release 5.29

Features

Subject: Add merchant webhook notifications for successful Lite transactions

Product/Platform: Gateway – Lite

Release Description:

Added support for posting signed transaction webhook notifications to a configured merchant endpoint after successful Lite transactions. Merchants can configure a webhook endpoint URL, transaction authentication type, and authentication secret; the gateway posts the transaction result payload with a LiteWebhookSignature so the merchant server can verify the notification.

Subject: Add BackOffice configuration for transaction authentication and webhooks.

Product/Platform: Gateway – Lite

Release Description:

Added BackOffice parameter choices and translations for transaction authentication type, authentication secret, and webhook endpoint URL. This introduces configurable Legacy, Merchant, and Application authentication modes for supported transaction integrations.

Subject: Add transaction type filtering to shared transaction views

Product/Platform: Gateway – BackOffice

Release Description:

Added a transaction type filter to shared transaction screens so users can filter batches by All, Authorisation, or Debit. The filter is wired into the shared transaction helper and date-selection UI.

Subject: Allow URL-encoded requests for file downloads

Product/Platform: Gateway – Admin

Release Description:

Updated the Portal Web API file download endpoint to accept both multipart/form-data and application/x-www-form-urlencoded requests. This improves compatibility with clients that post file-download commands as URL-encoded form data.

Subject: Add Zimswitch recurring transaction support for CBZ

Product/Platform: Gateway – Core

Release Description:

Zimswitch and CBZ Postilion processing now supports recurring transaction flows. CBZ authorisation and debit handling routes to PreAuthorizePayment and DebitPayment when no oppwa_UniqueID is present, and to a payment-status lookup once one exists. Zimswitch now creates a default ShopperResultUrl when one isn't supplied, and Portal has a new Zimswitch controller endpoint for unexpected MIT redirects.

Compliance

Subject: Extend DCAP customer address data support across 3DS/MPI providers

Product/Platform: Gateway – Core

Release Description:

Extended the DCAP mechanism used for 3DS/MPI risk and authentication data so customer billing and shipping address details can be posted to additional MPI providers. BankServ is the existing implementation reference; Netcetera, CyberSource, and MPGS are the additional 3DS/MPI rollout areas.

Subject: Add card acceptor URL and customer service phone compliance data

Product/Platform: Gateway – Core

Release Description:

Added support for card acceptor compliance data used by provider transaction processing, including the merchant/acceptor URL and customer service phone number. CSC/FIS and RAPostBridge/RAPostilion provider implementations were updated in this release to populate acceptor website and customer service phone fields into provider-specific message data.

Subject: Fix trading adjustment user details in AcquirerAdmin transaction profiles

Product/Platform: Gateway – BackOffice

Release Description:

Updated AcquirerAdmin transaction profile handling to use nullable database result fields for trading adjustment and user details. This fixes incorrect null handling when displaying iVeri and BackOffice user information for transaction trading adjustments.

Subject: Mastercard MPGID Support for I&M Bank

Product/Platform: Gateway - Core

Release Description:

This release addresses edge cases affecting online refund processing for card-present transactions.

The following improvements have been implemented:

Updated DE58 processing to support the corrected online refund flow.
Modified the BA file to populate the correct CaptureMethod and TerminalCapability values for online refunds of card-present transactions.

These changes improve the reliability and accuracy of online refund and reversal processing, particularly for same-day refund scenarios involving unsettled transactions