How do you know it wasn't the postie?
Based on how the parcel looked like.
There was one layer of clear tape, which was very neatly cut on the bottom only, and another layer on top of, exactly same same/cut marks.
Parcel sticker was on top of both layers, so I think that's 99% inside warehouse job, after packing, before dispatch.
Another thing which was a bit odd - but probably unrelated - was there wasn't tracking number in the link, and before it was always there, I had to call to find it out.