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

# Break/Unmatch a match group

> Use this endpoint to break an incorrect match group. This rejects the match with a reason and reverts all associated transactions to UNMATCHED status.



## OpenAPI

````yaml /en/openapi/v3-current/matcher.yaml delete /v1/matching/groups/{matchGroupId}
openapi: 3.1.0
info:
  title: Matcher APIs
  description: >-
    Complete API reference for the Matcher reconciliation engine, providing
    automated transaction matching between Midaz Ledger and external systems.
  version: v2.1.1
  license:
    name: Elastic License 2.0
    url: https://www.elastic.co/licensing/elastic-license
servers:
  - url: https://matcher.sandbox.lerian.net
security: []
paths:
  /v1/matching/groups/{matchGroupId}:
    delete:
      tags:
        - Matching
      summary: Break/Unmatch a match group
      description: >-
        Use this endpoint to break an incorrect match group. This rejects the
        match with a reason and reverts all associated transactions to UNMATCHED
        status.
      operationId: unmatch
      parameters:
        - description: A unique identifier for tracing the request across services.
          in: header
          name: X-Request-Id
          schema:
            type: string
        - description: Match Group ID
          in: path
          name: matchGroupId
          required: true
          schema:
            type: string
        - description: Context ID
          in: query
          name: contextId
          required: true
          schema:
            type: string
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UnmatchRequest'
        description: Unmatch payload with rejection reason
        required: true
      responses:
        '204':
          description: >-
            Indicates that the operation was successful with no content to
            return.
        '400':
          description: The request contains invalid parameters or payload.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: The request lacks valid authentication credentials.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '403':
          description: You do not have permission to access this resource.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '404':
          description: The requested resource was not found.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '500':
          description: An unexpected error occurred on the server.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      security:
        - BearerAuth: []
components:
  schemas:
    UnmatchRequest:
      properties:
        reason:
          example: incorrect match - amounts do not match
          type: string
      required:
        - reason
      type: object
    ErrorResponse:
      description: Standard error response returned by all API endpoints
      type: object
      required:
        - code
        - title
        - message
      properties:
        code:
          type: string
          description: HTTP status code as a string.
          example: '404'
        title:
          type: string
          description: Error type identifier.
          example: not_found
        message:
          type: string
          description: Human-readable error message with details.
          example: context not found
        error:
          type: string
          description: Deprecated. Error message for backward compatibility.
          deprecated: true
        details:
          description: Additional error context as key-value pairs
          additionalProperties: {}
          type: object
  securitySchemes:
    BearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: 'Bearer token authentication (format: "Bearer {token}")'

````