Do I need written permission from the other parent to extend my child's tourist visa in Thailand?

@Shaun ********

I’ve been in many times to local immigration offices and extended my children’s visas. They’ve never asked where my wife is. Nor do they ask any details of the other parent. Married or separated. Perhaps some offices may query but my guess is they won’t. Passport control at an airport or border is a different ball game.

@Steven **************

I know that. That's why I think you will need both parents consent to extend your stay if you are separated.