Scheduled Pre-Release Notifications (PRNs)

Refer to the table below for information of the latest Thredd Pre-Release Notifications (PRNs) and the scheduled system release dates for scheduled releases. For previous pre-release notifications, see Pre-Release Notifications for Past Releases.

This page displays PRNs with changes affecting the technical documentation. For a full list of PRNs, including PRNs prior to 2021, please contact the Operations team.

PRN Reference

Description

Related Guides

Scheduled Release

PRN-318

Added IsTaken, FromDate, ToDate, and ProductIds optional fields to the Ws_List_Pending_Fees endpoint request. Updated the description for Action Code 666.

Web Services Guide

22nd September 2026

PRN-295

Retired Raidiam as our CA (Certificate Authority) in favour of AWS CA. For applications or services using Thredd-issued certificates (API/mTLS integrations, authentication flows, or UIs), action will be required to remain connected.

Connecting to Thredd Guide

IAM Migration Guide

14 October 2026

PRN-330

Updated Customisable Card Number endpoints to use a HTTP 202 response code instead of HTTP 200. Added the new 121 webhook event code for card creation statuses. Existing integrations will need to be updated for the new status code and webhook event notification.

Introduction to Webhooks

Customisable Card Numbers

20th October 2026

PRN-325

Amended description of AVS response codes. R and W have been removed. U has been updated.

EHI Guide (XML)

EHI Guide (JSON)

21st October 2026

PRN-329

Additional Amount DE54 now supports up to 12 different amounts, and the character length is now 240.

EHI Guide (XML)

EHI Guide (JSON)

21st October 2026

PRN-307

Included Mastercard Reason Codes 7640 to 7649 for fee collection.

EHI Guide (XML)

EHI Guide (JSON)

Global Transaction Reporting Guide

Transaction XML Reporting

23rd October
2026

PRN-308

Added new P73 Scheme Transaction Identifier Values to support merchants enrolled in the Global Reach Acquiring Program.

EHI Guide (XML)

EHI Guide (JSON)

23rd October 2026

PRN-310

Added new C09 and F09 Scheme Transaction Identifier Values.

EHI Guide (XML)

EHI Guide (JSON)

23rd October 2026

PRN-311

Added MCCs 3306, 3884, 3885 and 3886 to Merchant Category Codes.

EHI Guide (XML)

EHI Guide (JSON)

23rd October 2026