As an Approver, Controller or Finance, you can reject an expense. Once you click the Reject tab in the Expense overview or within the expense (see screenshot below), a pop-up message will appear. 

You can select the Reject reason in the drop-down list (See Image A) and you can also add a comment (e.g. what should be changed) in the message box (See Image B). 

Image A

Image B

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