The MQ Appliance messaging server must protect against an individual (or process acting on behalf of an individual) falsely denying having performed organization-defined actions to be covered by non-repudiation.

Non-repudiation of actions taken is required in order to messaging service application integrity. Examples of particular actions taken by individuals include creating information, sending a message, approving information (e.g., indicating concurrence or signing a contract), and receiving a message. Non-repudiation protects individuals against later claims by an author of not having authored a particular document, a sender of not having transmitted a message, a receiver of not having received a message, or a signatory of not having signed a document. Typical messaging server actions requiring non-repudiation will be related to application deployment among developers/users and administrative actions taken by admin personnel.