The body which monitors continuing paramilitary activity is set to report on the £26.5m Northern Bank robbery.
More than £26m was stolen from the Northern Bank
The Independent Monitoring Commission's report is expected to confirm the security assessment that the IRA was behind the raid - which it denies.
Already given to the British and Irish governments, its findings are based on intelligence information.
It will also focus on the links between Sinn Fein and the IRA, in particular the crossover between the leaderships.
Thursday's IMC report is also to discuss the issue of possible sanctions against Sinn Fein.
The British government will then decide what action to take.
The IMC finished its investigation into the raid in Belfast in December last week.
PSNI Chief Constable Hugh Orde has blamed the IRA for the raid, a view also backed by the Garda Siochana.
However, the IRA denies the claims and, last week, it withdrew its offer of complete decommissioning.
Prime Minister Tony Blair said he accepted the chief constable's view that the IRA was behind the raid.
Meanwhile, the US special envoy to Northern Ireland, Mitchell Reiss, said no final decision had been made about how the US administration would shape this year's St Patrick's Day celebrations in Washington.
It follows reports that local parties would not be invited after the failure to broker a political deal and allegations of IRA involvement in the Northern bank robbery.
Mr Reiss said he was in no doubt as to who was responsible for the bank raid.
He said he had no reason to doubt the assessments of the British and Irish governments that the IRA was responsible.