It would be financially foolish to simply take the employer's word that all is well and here's some paper with a red stamp!
Parc Aviation is confident that they are paying taxes and will try and get me a copy of the letter for my interview. I will then take a contract if I pass, and the tax letter, to my home for consideration and pass by tax authorities here.
I am not taking my residence offshore. Don't want a nasty surprise after I submit the letter and find I have to pay taxes on income i assumed taxes were already paid on.