In message , John
Rumm writes
bof wrote:

Yes, but with the inconvenience on the addressee rather than the sender.


They can refuse to accept it.
Unfortunately 'they' don't know who it's from or what it is until
they've gone to the sorting office, at which point they've already
spent £2.00 on petrol and half an hour of their time, so might as
well pay the 1p shortfall + £1.00 fine to get it while they're there


How is that different any from the current situation when the sender
fails to affix the correct postage?

I don't know, it seems just the same to me.

--
bof at bof dot me dot uk