alt Hacker News> If Mayotte can use the euro even though the island is on the brink of collapse
Isn't Mayotte part of France and been for quite some time? I'd guess they switched to the Euro together with France and all the other French territories, but maybe I'm wrong?
Yes, Mayotte is very much part of France.
Monaco, Vatican and San Marino are however sovereign micro-states that switched to the euros because they already had a monetary agreement with France or Italy.