This Changelog post outlines the updates made to the Newline Platform in March 2026.

What We Improved

Newline API

• Updated instant_payment Object: Updated example transaction payloads on the transactions endpoint and elsewhere to reflect the current production instant_payment object fields instead of legacy fields.
• Updated IAT Object field descriptions: Replaced generic IAT field descriptions in the Developer Documentation with accurate descriptions sourced from the latest IAT Object Fields reference.
• Authentication Guide Corrections: Reviewed and corrected the Authentication Guide to ensure accuracy and alignment with the Authentication reference documentation.

What We Fixed

Newline API

• No bug fixes were required this month.

Why It Matters

These updates enhance the accuracy, consistency, and reliability of the Newline API documentation. By aligning transaction examples with current production instant_payment fields, refining IAT object descriptions, and correcting the Authentication Guide, developers can integrate with greater confidence and fewer assumptions. Clearer, up-to-date documentation reduces implementation friction, minimizes misinterpretation, and helps teams build and maintain integrations more efficiently.

We are committed to continuously improving our documentation to help clients create seamless financial experiences. For questions or further details, please contact Jennifer Morales