Difference between 2 fields in Expense Rejection screen

As a Manager, If you need to reject an expense you are given the following options at the Expense Entry - Expense Report Messages screen (please see attachment):

1. Receive a Copy

2. Send Copy to Manager

Silly question time...Why is there a choice? as the person approving/rejecting the expense you already are the manager. In other words, what is the purpose of the "Receive a copy" option?

I have no doubt there is a good reason for this but i need an explanation for my procedure manual. All help welcome.

thank you,

Denis