Unless he abdicates, he is entitled to be addressed as HM King Constantine of the Hellenes of HM The King of the Hellenes. Abdicated monarchs, like Michael of Romania, are HM The Former King of Romania. That's the only real difference, in the title. Neither of them have any political power, and neither have any chance of regaining their thrones.
Theoretically, you can't abdicate a throne that no longer exists. See in Michael's case, he abdicated the throne, and the monarchy was then abolished. With Constantine, the monarchy was abolished, so he theoretically can't abdicate a non-existent throne.
He is respecting the republic, he's just not catering to its whims.
Theoretically, you can't abdicate a throne that no longer exists. See in Michael's case, he abdicated the throne, and the monarchy was then abolished. With Constantine, the monarchy was abolished, so he theoretically can't abdicate a non-existent throne.
He is respecting the republic, he's just not catering to its whims.