Italy - Individual - Residence
Detailed description of individual residence rules in Italy
taxsummaries.pwc.com
"An anti-abuse rule provides that Italian citizens who transfer residence to countries considered as ‘tax havens’ (these are determined through a Decree of the Ministry of Finance), are deemed to be resident in Italy even if they are no longer registered in the Records of the Italian Resident Population, unless otherwise proven by the individuals."

Italy takes Switzerland off list of tax havens
Switzerland’s southern neighbour has removed it from a “black list” on which it has figured since 1999.

Anyone who knows other EU countries that have citizenship based taxation when moving to tax havens?