Touchless Expenses

Summary:

Client is considering implementing touchless expenses. There are some clarifications needed in order to proceed. Please advise on the below questions-

1. How will the receipts be handled if multiple receipts are grouped in one pdf and emailed to Oracle Expenses?
2. How will a case be handled if a receipt is emailed before the expense charge appears on the card. Will duplicate be detected and expenses be merged automatically?
3. How frequently does the receipt matching process run?
4. Which email field does Oracle read and are aliases included.If an employee has 2 emails, can they email receipts from both email ids to generate the Expense Reports