My former employer is going to be paying me monthly because of a non-compete agreement. My notice period has ended and they have already issued me a P45 statement -- I am not an employee anymore. I have no other sources of income (in the UK or abroad).
I have left the UK and HMRC have given me an NT tax code ("NTX" to be precise).
However, my former employer is stating that they are obligated by law to use a 0T tax code for all upcoming payments. They are citing https://www.gov.uk/employee-leaving which corroborates their statement, but I am worried that page might be incorrect (perhaps whoever wrote that page forgot to consider people who move abroad?).
Which tax code should my former employer be using in this situation? Keep using 0T or switch to NT? Thank you in advance!