This Changelog post details the updates made to the Newline Platform in September, 2025.

What We Fixed

Newline API

• ACH Return MQ Events

  Fixed issue where transfer_uid was showing as null on ACH return Transaction Created Message Queue events.

• Returns Endpoint in Sandbox

  Resolved error for POST /returns where company_id was not automatically populated from the original ACH transaction.

• Synthetic Account Validation

  Improved error messaging for invalid account_number input on POST /synthetic_accounts.

Why It Matters

These enhancements improve transparency, monitoring, and reconciliation capabilities across the Newline Experience API.

Fixes to sandbox and validation workflows reduce manual intervention and improve developer experience.

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