I have the flight: CMB to DXB to GRU to PTY all sold by single ticket through Emirates. GRU to PTY is a codeshare by Emirates operated by COPA airlines (CM702). I will be arriving around 5PM at GRU and departing at 1AM (about 8 hours layover). The arrival and departure is both from Terminal 3.
I've read that at GRU, the COPA airlines desk is behind immigration and I'm trying to transit without VISA.
How can I get the boarding pass at GRU without going through immigration at Terminal 3? Is there a transfer desk? Is this 100% guaranteed way of getting a boarding pass?
I think because of the codeshare, I won't be able to do web or mobile check in.