It says "money or payable document" yet doesn't define what a payable document is. Obviously a traveler's cheque would be. But, solely for legal clarification, I'd like to know if a credit card or debit card is defined as such by law. And for that metter a personal cheque.

I once saw a guy walk up to the officers at Immigration barefoot.

I stand corrected. Trying to navigate all the rules is a tangled thicket, and that was the information that I eventually came out of it with, though I don't recall from where. As an offshoot question: is it also possible to convert a Non-O to a Non-B at Immigration?

Yes, it is.

You cannot convert a tourist visa to a Non-Immigrant B visa at The Immigration Office on Chaengwattana Road. You will have to apply for one at an embassy outside of Thailand. The company will need to supply their business registration information, roster of employees, tax information, a map showing the location, as well as completing a form and providing a letter addressed to the embassy, copy of the owner's national I.D. card, etc. I am forgetting some items, but the company should be able to find it from the Ministry of Labour's and from Immigration's websites. Once you have the visa you will then have to apply for a work permit from The Ministry of Labour which requires much of the same information. Once the work permit is issued then you can go to Immigration in Rayong and get an extension of stay.

This is a basic layout of the procedure, as I say the details of which forms the exact documents from the company elude me for the moment.

I see. Thank you for clearing that up. I misunderstood.

I think we may have stumbled onto something with this questionable and apparently varying detention fee.

Thank you. I thought it was only a requirement for student and tourist visas. Also good to know about re-entering on an extension-of-stay, as my visa is a one-year single-entry.

As I understand it if you are married to the father/mother of the child then you must have a marriage visa; the guardian visa is only applicable if you aren't married or get divorced. I recall a post in this forum about that.

Non-Immigrant visas as well? So if you have a Non-O or Non-B then you are also required to be carrying 20,000 Baht on entering the country?