[ilyt]

Uh, here since forever post office put rubber stamp mark on stamps to prevent that, I'm surprised there is country that doesn't

[13of40]

IIRC, there were two kinds of cancellation ink - black and red. The black just dissolved in isopropyl alcohol, but red was permanent. Probably the result of some cost / benefit analysis.

[dopidopHN]

Yeah exactly. How do you go around the ink on the stamps? Ours ( French ) don’t go away with alcool. At least it was not the case in the 90´s.