The working and legal situation in Ireland has gone so crackpotty over the past few years that it is a wonder when anything gets done. There are letters for this and letters for that. Then there are safety regulations regarding everything from tea cups to ladders. Then there is cleanliness and nothing less than scrub clean of an operating theatre is acceptable. You need a high vis jacket to change a light bulb and a trolly with a flashing yellow light to deliver post. This is before we consider parental leave, maternity leave, force mejeure, sick leave, accidents at the workplace, etc. While safety is a requirement everywhere, I often wonder why foreign business people set up to anything moe than five employees.
It is probably wrong advice from me:- Sign and ignore all letters. If they are going to sack you, they'll sack you. Getting stressed over some letter produced by an intern in HR is probably the last thing any employee needs.