@Sue ******
I’m sorry that you can’t comprehend that an immigration office realises that foreigners can help out at their office to liaise with other foreigners to help easing the process of what they may need to do at an immigration office.
We volunteer to mitigate the process of what’s required and help those in need of services as to what may be required.
I’m sorry that you find it way too hard to believe that either people are willing to do that or that the Thai authorities allow it. Except it happens. Whether you can believe it or not it does.