# Release History
source: https://developer.mastercard.com/mastercard-send-account-info/documentation/release-history/index.md

## Release Notes {#release-notes}

The Mastercard Send releases are quarterly. Mastercard will share advance Release Notes to help notify participants of intended changes. For the release dates and Release Notes, see [Mastercard Send Release Notes](https://developer.mastercard.com/mastercard-send/documentation/send-release-notes/).

To stay current on all Mastercard Send API updates, be sure to visit that page regularly.

## Release History {#release-history}

Notable changes specific to this API are listed below (in reverse chronological order). The Release Date is when the change takes effect in Production. Changes prior to release 20.R1 (25 May 2020) are not included.

Ensure you check the main Release Notes page (see section above) for any other changes that may affect use of this API.

|     Release Date     |                                                                                                                                                                                                                                                  Notes                                                                                                                                                                                                                                                  |
|----------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 23 January 2026 25.4 | Updated the API specification server domains to the new RNTZ domains. See [Release Notes](https://static.developer.mastercard.com/content/mastercard-send/release-notes/mastercard-send-release-notes-25.4.pdf#page=3).                                                                                                                                                                                                                                                                                 |
| 21 May 2025          | Adjusted the API specification to include an 'All fields' example response that shows all possible fields.                                                                                                                                                                                                                                                                                                                                                                                              |
| 23 September 2024    | Improved the API specification, including adding sample response payloads.                                                                                                                                                                                                                                                                                                                                                                                                                              |
| 10 August 2023 23.R2 | Corrected the gateway error response structure to match the structure already shown in this documentation set. See [Release Notes](https://static.developer.mastercard.com/content/mastercard-send/release-notes/mastercard-send-release-notes-23.R2.pdf#page=4).                                                                                                                                                                                                                                       |
| 19 July 2023         | Improved the `funds_availability` field description in the API specification.                                                                                                                                                                                                                                                                                                                                                                                                                           |
| 26 July 2022 22.R2   | Added payment_type code 'P2C' (Person-to-Person Transfer to Card Account) to support a new use case. See [Release Notes](https://static.developer.mastercard.com/content/mastercard-send/release-notes/mastercard-send-release-notes-22.R2.pdf#page=4).                                                                                                                                                                                                                                                 |
| 3 March 2022 21.R4   | Added `acceptance_brand` response field, which will be present when the `enhanced_response` request field value is true. See [Release Notes](https://static.developer.mastercard.com/content/mastercard-send/release-notes/mastercard-send-release-notes-21.R4.pdf#page=5).                                                                                                                                                                                                                             |
| 25 November 2021     | Improved the field descriptions and attributes in the API specification.                                                                                                                                                                                                                                                                                                                                                                                                                                |
| 12 October 2021      | Added optional `origination_country` request field, which can be used to identify whether the Account Information API request is for a domestic or cross-border transfer. See [Release Notes](https://static.developer.mastercard.com/content/mastercard-send/release-notes/mastercard-send-release-notes-21.R3.pdf#page=3).                                                                                                                                                                            |
| August 2021 21.R2    | Moved the Account Information documentation content to its own set of documentation pages (these pages). The content was previously part of the documentation pages for Mastercard Send Person-to-Person and Mastercard Send Disbursements. See [Release Notes](https://static.developer.mastercard.com/content/mastercard-send/release-notes/mastercard-send-release-notes-21.R2.pdf#page=2).                                                                                                          |
| 25 May 2021 21.R1    | * Added an optional `enhanced_response` request field, which can be used to ensure the response will always include card attributes (unless the BIN or account range does not exist on a network). * Fixed a defect where the card attributes were not included in the response when sending eligibility is true and receiving eligibility is false. See [Release Notes](https://static.developer.mastercard.com/content/mastercard-send/release-notes/mastercard-send-release-notes-21.R1.pdf#page=6). |
| 5 January 2021       | Updated the API specification (presented in the documentation pages) from Swagger 2.0 to OpenAPI 3.0, adjusting the server base URLs and paths.                                                                                                                                                                                                                                                                                                                                                         |
| 25 August 2020 20.R2 | Made expiration date optional for pan schema in the `account_uri` field. See [Release Notes](https://static.developer.mastercard.com/content/mastercard-send/release-notes/mastercard-send-release-notes-20.R2.pdf#page=2).                                                                                                                                                                                                                                                                             |

## Announcements {#announcements}

Mastercard regularly publishes announcements relating to Operations, Rules/Standards, and other categories that might impact Mastercard Send API customers. To help you identify which announcements might be relevant to your business, we provide an Announcements spreadsheet. See [Announcements](https://developer.mastercard.com/mastercard-send/documentation/announcements/).