> ## Documentation Index
> Fetch the complete documentation index at: https://www.marqeta.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Account and Money Movement Release Notes

> Release notes for the Account and Money Movement platform: new features, enhancements, fixed issues, and notable documentation changes.

## October 2026 release notes

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`https://www.marqeta.com/docs/developer-guides/account-money-movement-release-notes/rss.xml`

**Documentation changes**

## Interest Accounts documentation

Marqeta has added documentation for the Interest Accounts API, which manages interest for checking and savings accounts. An interest tier defines the rate that a group of accounts earns, and enrolling an account in a tier applies that rate to the account's balance. The new documentation describes how to create interest tiers, set rates for each tier, and enroll accounts in a tier, either individually or in batches. For more information, see [Interest Accounts](https://www.marqeta.com/docs/core-api/interest-accounts/).

## Interest tier rate change event documentation

Marqeta has added documentation for the `interesttierratechange` webhook event, which is sent when a new interest rate is created for an interest tier. The event notification includes the tier the rate applies to, the account rate, the effective rate, and the date the rate takes effect. For more information, see [Interest tier rate change events](https://www.marqeta.com/docs/core-api/event-types.md#_interest_tier_rate_change_events).

## Instant Card Transfers guide

Marqeta has added the Instant Card Transfers guide, which describes how to move funds between a Marqeta-issued account and an external, non-Marqeta debit or prepaid card over card rails. The guide covers adding external cards, creating and tracking transfers, and handling ineligible cards and failed requests. This feature is currently in beta and subject to change. For more information, see [Instant Card Transfers](https://www.marqeta.com/docs/developer-guides/instant-card-transfers.md).

## External Cards and Transfers reference updates

Marqeta has updated the External Cards and Transfers reference pages with the `source_user_token`, `source_business_token`, `destination_user_token`, and `destination_business_token` request fields, the `CHARGEBACK`, `PENDING`, and `REJECTED` transfer `status` values, and sample request and response bodies. For more information, see [External Cards](https://www.marqeta.com/docs/core-api/external-cards/) and [Transfers](https://www.marqeta.com/docs/core-api/digital-banking-transfers/).

## Instant card transfer transition event documentation

Marqeta has added documentation for the `instantcardtransfertransition` webhook event, which is sent when an instant card transfer is pending, completed, rejected, or charged back. For more information, see [Instant card transfer transition events](https://www.marqeta.com/docs/core-api/event-types.md#instant-card-transfer-transition-events).


## Related topics

- [2025](https://www.marqeta.com/docs/developer-guides/account-money-movement-release-notes/2025.md)
- [Site Update Release Notes](https://www.marqeta.com/docs/developer-guides/site-update-release-notes.md)
- [January 2026 Card Issuing and Processing Release Notes](https://www.marqeta.com/docs/developer-guides/card-issuing-processing-release-notes/2026-01.md)
- [January 2026 Risk, Fraud, and Disputes Release Notes](https://www.marqeta.com/docs/developer-guides/risk-fraud-disputes-release-notes/2026-01.md)
- [2024 Release Notes](https://www.marqeta.com/docs/developer-guides/release-notes-2024.md)