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Organisational control principles, such as those expressed in the separation of duties, delegation of obligations, supervision and review, support the main business goals and activities of an organisation. One specific type of an obligation is that of a workflow task. The delegation of a task from one principal to another will result in a review task on the side of the delegating principal, allowing for the meaningful tracking of work. The target of this review task is the delegated task and a defined evidence needs to be negotiated, generated by the delegatee and reviewed by the delegator. This paper expands on earlier work we have done on delegation and revocation of tasks and the resulting review relationships. The concept of evidence had not yet been treated in sufficient detail and accordingly, a more detailed discussion around a framework for evidence lifecycle management is the subject of this paper.