Quote:
Does any postal service still collect postage dues on underpaid mail?
Did you mean, "...still
use postage due stamps when collect
ing postage due
s on underpaid mail?"
I cannot answer for all of the current countries of the world, but,
use 'em if you got 'em seems likely.
Unlike, GeoffHa, here in the USA I must pay my postal person postage due when the mail is handed to me. Now that postage due may have been assessed anywhere along the mail stream, including the postmaster at my office who seem quite adept at catching those
eBay sellers who underpay postage. When I pay, either in money or stamps, stamps are affixed and date cancelled.