Iexpenses Claim Approver Notification

Hello Gurus,

Our customers are currently using version R12.1.3.

We had got a new requirement to customize the Iexpenses approval notification.

Attached an example of a expense claim notification submitted to approver.(marked the Information section where they wanted to add/include another information)

The requirement is that they need to add a new custom Information (which appears on top of the notification)

Ex: 1. This expense report requires imaged receipts or a text attachment to be submitted for certain lines.

       2. Please see any instruction below and review the expense report details .

How can we achieve this?

Any pointers to the solution would be much appreciated.