What must you do to reject a transaction effectively?

To effectively reject a transaction, selecting the transaction and clicking the Reject button is the key action required. This step is crucial because it initiates the formal process of rejecting the transaction within the system. By performing this action, the transaction status is updated, and it signals to the system, as well as to any other relevant parties, that the transaction will not be processed.

While documenting the reason for rejection may be important for record-keeping and clarity, it is not the immediate action required to reject the transaction within the system. Similarly, having the right authority or confirming your decision with another approver may be pertinent in some contexts, but they do not directly constitute the process of rejecting the transaction itself. The primary objective is to ensure the action is taken within the system, which is accomplished by selecting the transaction and clicking the Reject button.