Apple ID / Ireland postcodes :/
IRish mac users : what digit number could be filled in " postcode " field in app store billing adress section ?
MacBook Pro 15", macOS 10.15
If necessary, contact iTunes Support. Either use the form or scroll to the bottom of the page in the 2nd link. Follow through the screens to get a chat or telephone option.
iTunes Store - Contact Us - Official Apple Support. https://support.apple.com/en-euro/itunes-contact
iTunes Support – world wide https://support.apple.com/choose-country-region/itunes