The Referendum Commission has been given €3.3 million for an information campaign on the upcoming referendums.
The proposals to abolish the Seanad and to set up a new Court of Appeal will be voted on Friday October 4th.
Two million guides will be sent to homes around the country next week - while voters can check the electoral register through Facebook.
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The Chairperson of the Referendum Commission - Ms Justice Elizabeth Dunne - says she doesn't believe the full budget will be spent: