@Loukas
Did you ever find out why? This article implies it was somehow tied to the precise accounting used: https://www.ghanabusinessnews.com/2022/04/05/why-is-ghana-importing-45m-worth-of-stamps-from-malta-a-tweeter-asks/
I also found the post office denoucment, but they didn't provide any explanation...
@afouxenidis
@tobychev @afouxenidis I think it was probably Malta printing the Ghanaian banknotes and similar certificates