After some thought, it seems the DE who handed you the envelope was probably given the envelope with the expectation that he prepare a ceremony, or at least inform your TC that your stuff had arrived and was ready to be presented. Your name on the envelope was to inform the DE who the ceremony was for, not that you were to be simply given the envelope.
If I'd been handed the envelope, I'd have stuffed it in my little satchel and taken it home and forgotten about it (I have a bad habit of doing exactly that) until I had reason to go through it at a later date.