http://www.citizensinformation.ie/categ ... ralisation
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Revoking citizenship
The Minister for Justice, Equality and Law Reform can revoke your certificate of naturalisation if:
* You obtained it through fraud, misrepresentation or concealment of material facts or circumstances
* You have, through an overt act, failed in your duty of fidelity to the nation and loyalty to the State
* You were ordinarily resident outside Ireland (other than in public service) for a continuous period of 7 years and, without a reasonable excuse, did not register your name and a declaration of your intention to retain Irish citizenship with an Irish diplomatic mission or consular office or with the Minister for Justice, Equality and Law Reform on an annual basis
* You are also, under the law of a country at war with the State, a citizen of that country
* You have, by any other voluntary act other than marriage, acquired citizenship of another country.
Before revoking your certificate of naturalisation, the Minister for Justice, Equality and Law Reform will inform you in advance, stating the reasons why the certificate is being revoked and your right to apply to the Minister for an inquiry into the reasons for the revocation. If you apply for an inquiry into a decision to revoke your certificate of naturalisation, the Minister will refer your case to a Committee of Inquiry, which will report its findings to the Minister. A notice of the revocation of your certificate of naturalisation will be published in Iris Oifigiúil (Ireland's official State Gazette).
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The fact that they can revoke citizenship this way doesn't mean they will do it, however.