> ## Documentation Index > Fetch the complete documentation index at: https://devdocs.xbox.com/llms.txt > Use this file to discover all available pages before exploring further. # Cancel Server Backfill Ticket > Cancel a server backfill ticket. ## Error codes This operation may return the following PlayFab errors: | Error | Code | | --- | --- | | MatchmakingEntityInvalid | 2001 | | MatchmakingQueueNotFound | 2016 | | MatchmakingRequestTypeMismatch | 2058 | | MatchmakingTicketAlreadyCompleted | 2029 | | MatchmakingTicketNotFound | 2018 | | MatchmakingUnauthorized | 2056 | ## OpenAPI ````yaml /services/playfab/api-references/rest/multiplayer/multiplayer.openapi.json post /Match/CancelServerBackfillTicket openapi: 3.0.0 info: version: '260922' title: PlayFab Multiplayer API description: >- API methods for managing multiplayer servers. API methods for managing parties. The lobby service helps players group together to play multiplayer games. It is often used as a rendezvous point for players to share connection information. The TrueSkill service helps titles to estimate a player's skill based on their match results. The player skill values from this service are commonly used by a matchmaking service to provide players with balanced matches. termsOfService: https://playfab.com/terms/ contact: url: https://community.playfab.com/index.html license: name: Apache 2.0 url: https://github.com/PlayFab/API_Specs/blob/master/LICENSE servers: - url: https://{titleId}.playfabapi.com description: PlayFab title endpoint variables: titleId: default: your_title_id description: Your PlayFab title ID (hex). security: [] tags: - name: Lobby description: '' - name: Matchmaking description: Matchmaking APIs - name: Matchmaking Admin description: Matchmaking Admin APIs - name: MultiplayerServer description: Multiplayer Server APIs - name: PubSub description: PlayFab PubSub APIs - name: TrueSkill description: TrueSkill APIs - name: TrueSkill Admin description: TrueSkill Admin APIs paths: /Match/CancelServerBackfillTicket: post: tags: - Matchmaking summary: Cancel Server Backfill Ticket description: | Cancel a server backfill ticket. ## Error codes This operation may return the following PlayFab errors: | Error | Code | | --- | --- | | MatchmakingEntityInvalid | 2001 | | MatchmakingQueueNotFound | 2016 | | MatchmakingRequestTypeMismatch | 2058 | | MatchmakingTicketAlreadyCompleted | 2029 | | MatchmakingTicketNotFound | 2018 | | MatchmakingUnauthorized | 2056 | operationId: CancelServerBackfillTicket requestBody: content: application/json: schema: $ref: '#/components/schemas/CancelServerBackfillTicketRequest' description: >- Only servers can cancel a backfill ticket. The ticket can be in three different states when it is cancelled. 1: the ticket is matching. If the ticket is cancelled, it will stop matching. 2: the ticket is matched. A matched ticket cannot be cancelled. 3: the ticket is already cancelled and nothing happens. There may be race conditions between the ticket getting matched and the server making a cancellation request. The server must handle the possibility that the cancel request fails if a match is found before the cancellation request is processed. We do not allow resubmitting a cancelled ticket. Create a new ticket instead. responses: '200': $ref: '#/components/responses/CancelServerBackfillTicketResult' '400': $ref: '#/components/responses/ApiErrorWrapper' security: - EntityToken: [] components: schemas: CancelServerBackfillTicketRequest: description: >- Only servers can cancel a backfill ticket. The ticket can be in three different states when it is cancelled. 1: the ticket is matching. If the ticket is cancelled, it will stop matching. 2: the ticket is matched. A matched ticket cannot be cancelled. 3: the ticket is already cancelled and nothing happens. There may be race conditions between the ticket getting matched and the server making a cancellation request. The server must handle the possibility that the cancel request fails if a match is found before the cancellation request is processed. We do not allow resubmitting a cancelled ticket. Create a new ticket instead. type: object properties: CustomTags: description: >- The optional custom tags associated with the request (e.g. build number, external trace identifiers, etc.). type: object QueueName: description: The name of the queue the ticket is in. type: string TicketId: description: The Id of the ticket to find a match for. type: string required: - TicketId - QueueName example: TicketId: 1c4b0daa-150e-47ae-9923-d770c0f9b07c QueueName: custom123 CancelServerBackfillTicketResult: type: object properties: {} example: {} ApiErrorWrapper: description: The basic wrapper around every failed API response type: object properties: code: description: Numerical HTTP code type: integer status: description: String HTTP code type: string error: description: Playfab error code type: string errorCode: description: Numerical PlayFab error code type: integer errorMessage: description: Description for the PlayFab errorCode type: string errorDetails: description: Detailed description of individual issues with the request object type: object required: - code - errorCode responses: CancelServerBackfillTicketResult: description: '' content: application/json: schema: type: object properties: code: type: integer description: >- The Http status code. If X-ReportErrorAsSuccess header is set to true, this will report the actual http error code. status: type: string description: The Http status code as a string. data: $ref: '#/components/schemas/CancelServerBackfillTicketResult' example: code: 200 status: OK data: {} ApiErrorWrapper: description: This is the outer wrapper for all responses with errors content: application/json: schema: $ref: '#/components/schemas/ApiErrorWrapper' securitySchemes: EntityToken: type: apiKey in: header name: X-EntityToken description: >- This API requires an Entity Session Token, available from the Entity GetEntityToken method. ```` ## Related topics - [Cancel Server Backfill Ticket](/services/playfab/api-references/rest/multiplayer/matchmaking/cancel-server-backfill-ticket.md) - [Using Server Backfill Tickets - REST API](/services/playfab/multiplayer/matchmaking/backfill-tickets.md) - [PlayFab Release Notes 2020](/services/playfab/release-notes/2020.md) - [Cancel All Server Backfill Tickets For Player](/services/playfab/api-references/rest/multiplayer/matchmaking/cancel-all-server-backfill-tickets-for-player.md) - [Using Server Backfill Tickets - Multiplayer SDK](/services/playfab/multiplayer/matchmaking/backfill-tickets-multiplayer-sdk.md)