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-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