To add an additional receipt to an expense on a mobile device, follow the steps below:
1. In the relevant expense, click on the add receipt button at the top of the screen.
2. Select the source of the additional receipt you want to add to the expense.
3. Once a receipt has been selected/captured, they will appear at the top of the screen.
4. Repeat from step 1 - 3 to add any additional receipts to this expense.