Bench warrant for non attendance

read that - they are solicitors. they want business! if you can afford it with or without family help get legal advice. pay for it if you can. free legal aid may be possible, but take legal advice on that.

otherwise I recommend you call the guard and get them onside. offer to meet them at the courts at an arranged date so he can execute the warrant.

We might be missing a few details in terms of terminology.

Sheriff? Rather than Guards.

https://www.citizensinformation.ie/en/money-and-tax/personal-finance/debt/enforcement-of-debt-judgments/

In fairness the letter does say to contact the Gardai so it’s likely legitimate

They rang the hospital you were in?! FFS

Ya good man. Look at the state of that letter he received. It’s as non-binding as it gets

If you look at the image in post 11 above you will notice that the OP has edited to to remove identifying details.

It does use a phrase

"We refer to the above" so I suspect that the relevant court date/references were contained in the parts which are obscured.