this is hilarious, in such a specific normal case, c'mon...he didn't tell, that immigration officer forced him to get naked in order to control him, if he has money, which he earned through his job and DTV on his body...
I mean, they can see the stamps(that I was in Thailand in the last couple month) and agreement date in remote working agreement is 01.09, so actually they know. But I could ask to get a contract from 01.10, instead of 01.09, so it would just have been 15 days...better or not necessary?