I also thought the 'Send Later' checkbox allowed for a created invoice to not be sent or seen by the customer until I choose to actually send it myself later.  However, I just had our customer ask for another copy of an invoice that is marked as 'Send Later'. When I looked into the invoice, it shows they Viewed it.  How is that possible? How did they know the invoice existed if I never sent it?  The system shows it's never been sent, it's still check marked as 'Send Later', but it was "Viewed" by our customer.