Both sides claim EU campaign win
Two main players in the fiscal treaty campaign claim they have scraped a win in the referendum despite being on opposite sides.
Taoiseach Enda Kenny and Libertas founder Declan Ganley both claimed victory during the final days of campaigning ahead of Thursday's controversial vote.
Mr Kenny admitted he was confident - but not overconfident - that the result would swing to the Yes side.
"No referendum or no election is won until all the votes are counted," he said.
"As far as I'm concerned we are going to keep this up until the close of polls.
"This is a choice of the people now and we've tried to explain to every issue about what's in this treaty and what's not in it."
But Mr Ganley said while it was too close to call, he believed there would be a win for the No side.
"The austerity argument is something that is relevant to everybody because everybody is feeling it either directly, or a member of their family or friends are feeling it directly," he said.
"The fact that everybody in this country knows that our banks are sort of paralysed and that this bank debt is killing us. And everybody knows that Enda couldn't negotiate his way out of a wet paper bag."
More than 3.1 million people are eligible to vote when polls open nationwide on Thursday - but less than 60% of those eligible turned out to vote on the Nice and Lisbon treaties.