Definition of postage due in English:
1That part of the postage that was not prepaid.
- Sponsors are not responsible for incomplete, postage due, lost, late, damaged, stolen, illegible or misdirected entries for inaccurate contest related information provided by Sponsors.
- I'd mail him all the copies of his books I owned, postage due - if I hadn't dropped them off at the Salvation Army the last time we moved.
- I guess sending them all back postage due, wrapped around bricks, with Hitler moustaches and horns drawn on all the models had the desired effect.