@Robert ******
I’m not keeping anything secret — I simply wanted to share my experience, since most posts about difficulties are often shared anonymously.
You could also just ask in a polite way... Right?
I spoke with the other people waiting there, which is how I know about their situations. I also overheard some of the conversations between the officers and the other travelers. I’m still in contact with one person who was denied entry, as I helped inform her partner, who was allowed to enter.
As for my case: I had to show my business registration and the same documents I originally submitted for my DTV application. According to the officers, they don’t have access at the airport to the documents submitted to the embassy.
I also had to fill out a form where I provided details such as my address in Thailand, the amount of cash I was carrying, my bank balance, etc.