Скачать или смотреть The mystery of Peter Casey's green card

How hard is it to return and how long does it take to return a US green card? On the Tuesday 23rd of October 2018 Primetime presidential debate, Peter Casey says although he doesn't currently pay tax in Ireland because he is a US green card holder, he would change that by returning the green card in the following week. However, at the end of that following week, on the Friday 2nd November Late Late Show, he says he has not yet returned the card and refuses to say when he will.

Is he already in violation of this?:

https://help.cbp.gov/app/answers/deta...

This link contains all relevant information and forms for returning a green card, turns out it's as simple as filling out the form and popping it and the card in the mail:

https://www.uscis.gov/i-407