After agreeing last month in principle to send the letter to BIS and to fellow former Yugoslav successor countries, the pair agreed today that the content of the letter be first coordinated with the two appointed experts on the issue on each side, France Arhar and Zdravko Rogić, Erjavec said.

He hopes Arhar and Rogić can already exchange views next week and estimates "that this letter could be sent in the first half of June".

The step comes after Slovenia and Croatia agreed during Croatia's efforts to secure support for its EU accession to have the issue of Yugoslav-era savings deposits with the defunct Slovenian bank resolved as part of succession.