I have a brochure that looks fine in InDesign but when I export it as PDF (Print) I get three letters "Hon" in the upper left hand corner. I will attach a screenshot of each.
As a test I turned off the Flag and semi transparent white rectangle objects and exported to PDF and the "Hon" was gone. But neither of these elements includes these letters.
Please show us the Layers panel with all the layers expanded.
Thanks for the quick reply, Peter. I'm embarrassed to admit that the text WAS a part of the semi-transparent rectangle but with InDesign Screen Mode set to Preview, it was not visible.