The Department of Justice issue Naturalisation Certificates to persons meeting the relevant criteria necessary to obtain such certificates. Based on this certificate, persons will make an application to the Passport Service in the Department of Foreign Affairs for an Irish Passport. In order to issue a Passport, the Minister must be satisfied as to the identity of the applicant and that they are an Irish Citizen. Further the Minister may process such personal data, in respect of an applicant for a passport as are required for the issue of a passport to the applicant and the maintenance of the integrity of the system for issuing passports. The Passport Service uses the information provided to verify the validity of the Naturalisation Certificate received from the applicant.