What are the best and most trustworthy agencies for obtaining a DTV visa for Thailand from Vietnam?

"If you don't qualify an agent is going to magically get you a DTV." Well, you are criticizing those who'd need an agent for not being able to input their own name accurately, but look at your own sentence. You obviously wanted to say the opposite, so... Application denied? Anyway, there are plenty of reasons for being denied or having your application cancelled, some might be obvious, others much less, and agents are usually experts in optimizing your chances of being successful. A waste of money? Well, for some, maybe, but each case/person is different, and depending on what country you're applying from (especially non-English countries), it can be really tricky to deal with all the translations, cover letter, portfolio... I'm well aware none of what I say will change your mind, and I actually couldn't care less. I'm just voicing my opinion on the matter.

@Nick *****

correction: if you don't qualify you're not getting a DTV regardless. If you do qualify you save hundreds of dollars on "agent fees" by doing it yourself. But some will be "taxed" despite Thailand giving you a great deal on a platter.

@Nick *****

English is the world's global language. All Thai embassies and consulates worldwide accept and prefer English or Thai language documents where possible. In most locations, it's required. A few European ones might also accept documents in the language of the application country too, such as German or French.

@Paul ******

Maybe, but not everyone speaks English or wants to have to deal with documents which have to be translated into it. It can be daunting for many people, unfamiliar with the language, especially regarding financial and administrative documents. And fees are not in the hundreds. Some agents offer their services for much less, starting at around a hundred USD, and even guarantee you success in getting your DTV.

@Nick *****

Documents need to be translated into Thai or English at MOST consulates around the world, whether an applicant likes it or not. The exception being a few European consulates, which take certain documents issued in the local language.

@Nick *****

Pretty unlikely anyone would come to Thailand without knowledge of at least English and preferably Thai as well. They'd be completely unable to communicate with anyone and Thais would be scratching their heads at how can a foreigner not speak English?

@Kevin ********************

Agency names are not welcome here, unfortunately. It's a famous one, in Bangkok. Its name evokes a navigation tool.