Most colleges seal them in envelopes because they know most people need an official copy for interviews, etc. Can you tell if the paper is folded up within an envelope inside?

I’m just thinking worst case. When I submitted for mine, I got an initial letter from my university (in a FedEx envelope) saying they couldn’t provide me with my transcript because I had an unpaid parking ticket. It turned out to be untrue (I had graduated and moved away for two years by the time the ticket was issued), but walking into the interview with something like that would be straight out of a sitcom.