It is essential that the photographs submitted with the application meet the Passport Office photo guidelines. These guidelines are based on internationally accepted standards. See Advice for applicants and Technical Advice for Photographers links below for details.
Unacceptable photographs include where the face is not clear, the top of the head is not showing, where parents hold infants in their arms, person has dark glasses, home produced photographs which are not identical or where the paper quality is not suitable for scanning by the Passport Office, and photos taken against a dark background.
Poor quality photographs account for the highest proportion of applicants which must be rejected by the Passport Office. The Passport Office would encourage applicants to study the photograph guidelines insert which accompanies the application form and also the information contained on this website before making their application.
Irish Passport Online Photographer Guidelines
Source: https://www.dfa.ie/passports-citizenship/top-passport-questions/photo-guidelines/
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