Have you heard about crypto stamps or the NFT virtual stamps? The latest issue of Philatelia Lusitana includes a short but comprehensive article signed by the CTT (Portuguese Post) that explains the story.
The CTT is only the 8th European Post that produced a crypto stamp. However, according to the article, CTT combined the physical with the digital issue and the gamification aspect, which offers the CTT customer the opportunity of winning complimentary prizes.
You may download the article from here: