SINN FEIN is to hold a 'coming home' event for John Downey, the party said today.
A prosecution case against Mr Downey (62) was dropped in London this week.
He had been due to face trial for the murders of four British soldiers who died in an IRA bomb in London's Hyde Park in 1982.
However an Old Bailey judge stopped the case after it was revealed the British government had given Mr Downey a letter saying he wasn't on any 'wanted' list in the UK.
The republican - said by supporters to have been a avid supporter of the ceasefire and the peace process - had denied the charges.
The issue has sparked a political crisis in the North.
Co Clare man Downey, now living in Creeslough, Co Donegal, arrived back in Ireland last night.
Sinn Fein TD Pearse Doherty said a "social event" would take place at The Lagoon Bar in Termon Co Donegal this Saturday night.
A fundraising event to pay his legal fees was held at the same pub last June.
Deputy Doherty told today's Donegal Democrat that the weekend party is being held to "thank the hundreds of people from across the county and further afield" who helped raised funds for Mr Downey's legal defence.