# cancel(withLocalizableMessageKey:arguments:completionHandler:) Cancels an exchange request. ``` func cancel(withLocalizableMessageKey key: String, arguments: [String], completionHandler: (@Sendable ((any Error)?) -> Void)? = nil) ``` ## Parameters `key` The identifier for looking up the translated cancel message in the default `Localized.strings` file. If you use a formatted string with specifiers, provide the arguments. `arguments` A list of arguments to substitute into the localized string if it’s formatted and contains specifiers. `completionHandler` The block that GameKit calls when it completes the request. The block receives the following parameter: - *error*: Describes an error if it occurs, or `nil` if the operation completes. An error occurs if you previously cancel this exchange request. ## Discussion You can cancel both an active and completed exchange request. If your game isn’t running or is in the background on recipient devices, a notification containing the localized message you provide appears. When the participant taps or clicks the notification, GameKit launches or brings the game to the foreground and then invokes the [`player(_:receivedExchangeCancellation:for:)`](/documentation/GameKit/GKTurnBasedEventListener/player(_:receivedExchangeCancellation:for:)) protocol method. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)