An audit investigation into agreements entered into by the previous Cook Islands government with fuel suppliers is 80 percent complete.
The Director of Audit, Paul Allsworth, says they are aiming to have the report finished by the end of this month.
Dubbed Toagate by local media, Mr Allsworth explained that the investigation has proceeded very carefully as the matter is complex and very sensitive.
A former deputy prime minister, Sir Terepai Maoate, was sacked by the prime minister, Jim Marurai, over the issue which was widely criticised by the public.
The Audit report cannot be made public until it is tabled in parliament but Mr Marurai has said he will not call parliament before the general election scheduled for September.