# Release History
source: https://developer.mastercard.com/mastercom-extended/documentation/change-logs/index.md
#### Summary of Release History {#summary-of-release-history}
This section will be used to log updates to this documentation site, with dates and a summary of what changed.
| Date | Specification | OAS Version | Description |
|----------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| February 2026 | [Queues and Reports Specification](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/queues-reports/index.md) | 1.2.2 | Specification updated to include Pending Documentation Report. * Updated [API Reference](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/index.md) * Updated Reports [Tutorials](https://developer.mastercard.com/mastercom-extended/documentation/tutorials-and-guides/index.md) |
| January 2026 | [Queues and Reports Specification](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/queues-reports/index.md) | 1.2.1 | Updated `GET /queues`, `GET /queues/{queue_id}/claims`, and `GET /report-definitions`. The maximum of `limitParameter` changed to 400. * Updated [API Reference](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/index.md) |
| January 2026 | [Send Payment Dispute Processing Specification](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/send-dispute-processing/index.md) | 1.1.0 | Updated `POST /send-payments/claims/{claim_id}/disputes`. Renamed `B_SUSPECTED_FRAUD` to `B_FRAUD` within `sendDisputeReasonCode`. * Updated [API Reference](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/index.md) |
| November 2025 | [Dispute Processing Specification](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/dispute-processing/index.md) [Transactions, Claims, Documents, and Fraud Specification](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/claims-docs-txn/index.md) [Queues and Reports Specification](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/queues-reports/index.md) | 1.2.0
1.3.0
1.2.0 | Specification updated to support acquirers and issuers in India and fraud submission functionality. Refer to [AP 12116.1 Mastercom Extended for Issuers and Acquirers in India](https://trc-techresource.mastercard.com/r/bundle/m_an12116_en-us/page/d/en-US/) in the Technical Resource Center on Mastercard Connect for additional information. * Updated [API Reference](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/index.md), [Tutorials](https://developer.mastercard.com/mastercom-extended/documentation/tutorials-and-guides/index.md), [Use Cases](https://developer.mastercard.com/mastercom-extended/documentation/use_cases/index.md), [Code and Formats](https://developer.mastercard.com/mastercom-extended/documentation/code-and-formats/errorsandexceptions/index.md), and [FAQs](https://developer.mastercard.com/mastercom-extended/documentation/support/index.md). |
| September 2025 | [Transactions, Claims, and Documents Specification](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/claims-docs-txn/index.md) | 1.2.0 | The specification is updated to support full and partial chargebacks and representments on single message purchase with cash back transactions. Added new parameters and updated descriptions to `GET /claims/{claim_id}`, `POST /claims/{claim_id}/disputes`, `POST /claims/{claim_id}/chargebacks/{event_id}/representments` * Updated [API Reference](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/index.md), [Tutorials](https://developer.mastercard.com/mastercom-extended/documentation/tutorials-and-guides/index.md) and [Code and Formats](https://developer.mastercard.com/mastercom-extended/documentation/code-and-formats/errorsandexceptions/index.md). |
| September 2025 | [Queues and Reports Specification](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/queues-reports/index.md) | 1.1.0 | Added new parameter to `GET /queues/{queue_id}/claims`. * Updated [API Reference](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/index.md) and [Tutorials](https://developer.mastercard.com/mastercom-extended/tutorial/queues/step-1/index.md). |
| August 2025 | [Transactions, Claims, and Documents Specification](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/claims-docs-txn/index.md) | 1.1.0 | Added new parameters to `POST /transactions/searches` and `GET /claims/{claim_id}`. Updated [API Reference](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/index.md). |
| July 2025 | - | - | Updated [Tutorials](https://developer.mastercard.com/mastercom-extended/tutorial/reports/index.md) to include additional details on available standard reports. |
| February 2025 | - | - | Updated [ISO Country and Currency Codes](https://developer.mastercard.com/mastercom-extended/documentation/code-and-formats/isocountryandcurrencycodes/index.md) to support new currency for Curacao and Sint Maarten, aligning with the Central Bank of Curaçao and Sint Maarten. |
| February 2025 | [Mastercom Extended specifications](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/index.md) | 1.0.0 | Enhancements include: * Specification separated into four separate files for increased customer clarity. The OAS version was reset to 1.0.0. * Added Send Payment dispute processing capabilities. * Updated [API Reference](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/index.md), [Use Cases](https://developer.mastercard.com/mastercom-extended/documentation/use_cases/index.md), [Tutorials](https://developer.mastercard.com/mastercom-extended/documentation/tutorialsandguides/index.md), and [FAQs](https://developer.mastercard.com/mastercom-extended/documentation/support/index.md). Added [Quick Start Guide](https://developer.mastercard.com/mastercom-extended/documentation/quick-start-guide/index.md) and [Integration and Testing](https://developer.mastercard.com/mastercom-extended/documentation/integration-and-testing/index.md). |
| December 2024 | [Mastercom Extended specification](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/index.md) | 2.0.0 | The Mastercom Extended API Single Message functionality, Phase 1A and 1B only, is released in production. Refer to [US 8733.6 Migration of Single Message System Dispute Processing into Mastercom](https://trc-techresource.mastercard.com/r/bundle/m_AN8733_en-us/page/d/en-US/), [LAC 10231.3 Migration of Single Message System Dispute Processing into Mastercom](https://trc-techresource.mastercard.com/r/bundle/m_an10231_en-us/page/d/en-US/), or [MEA 10740.3 Migration of Single Message System Dispute Processing into Mastercom](https://trc-techresource.mastercard.com/r/bundle/m_an10740_en-us/page/d/en-US/) in the Technical Resource Center on Mastercard Connect for production dates by region. |
| July 2024 | [Mastercom Extended specification](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/index.md) | 2.0.0 | The specification is updated to include case filing functionality. Updated [API Reference](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/index.md), [Use Cases](https://developer.mastercard.com/mastercom-extended/documentation/use_cases/index.md), and [Tutorials](https://developer.mastercard.com/mastercom-extended/documentation/tutorialsandguides/index.md). |
| June 2024 | [Mastercom Extended specification](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/index.md) | 1.0.0 | Updated [Use Cases](https://developer.mastercard.com/mastercom-extended/documentation/use_cases/index.md) and [Tutorials](https://developer.mastercard.com/mastercom-extended/documentation/tutorialsandguides/index.md). |
| May 2024 | [Mastercom Extended specification](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/index.md) | 1.0.0 | Temporarily removed "Search for claims within a queue" from Mastercom Extended Complex Business Flows Tutorial. GET /queues/{queue_id}/claims is under revision until July 2024. |
| March 2024 | [Mastercom Extended specification](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/index.md) | 1.0.0 | The specification is updated to include additional dispute processing functionality and changes to the existing specification. Refer to [GLB 9141.1 Updates to Existing Mastercom Extended API Specification](https://trc-techresource.mastercard.com/r/bundle/m_an9141_en-us/page/d/en-US/) in the Technical Resource Center on Mastercard Connect for details about changes between the Version 0.0.1 specification and the Version 1.0.0 specification. |
| 2021 | [Mastercom Extended specification](https://developer.mastercard.com/mastercom-extended/documentation/api-reference/index.md) | 0.0.1 | Initial publication |