Liquorice

Not sure if I understand your question. The Non O-A visa is valid for 12 months, each entry permits a stay of 12 months. It's possible to stay in Thailand for 2 years by entering again just prior to the visa expiry date. The financial requirement for the visa can be from your Belgian bank account.

Statement for the proof of funds. Letter confirming you as the named account holder.

The necessity for a work permit.

For you or he to file the TM30, a copy of his Blue book (different address), Thai ID card and a copy of the Chanote for the residence you live at. The Chanote proves he owns that residence.

What is Mode of Travel - Air/Land/Sea and Mode of Transport - Aircraft/Car/Boat

You need at least 15 days permission of stay remaining to process a Non Imm O application. Certain Immigration offices require 23 days. You can apply for a 30-day extension to your VE entry and a further 60 day extension for visiting Thai spouse.

Immigration will not accept online printed statements. They must be issued by the bank who will stamp, date and sign it. (Certified by a bank official)

I don't recall reading any reports of CR operating rogue procedures. You should be able to proceed using the Immigration information I posted without any deviations to the requirements.

@JAG From what you've posted, the option of a Non O based on retirement may be possible, dependent on when the 800K THB will be deposited in a Thai bank. You currently have permission of stay until the beginning of May, and a 30-day extension will take you to the beginning of June. A border run and further VE entry would grant a further 30/60 day stay + 30 day extension taking you to at least the end of July, beginning of August. Hopefully, you would then have the sufficient funds in a Thai bank account. To apply for the Non O based on retirement, the 800K only needs to be in the account on the day of the application for the Non O. Requirements, item 9 on this page. https://bangkok.immigration.go.th/en/issuing-and-changing-type-of-visa/ If you apply for the Non O, the 1-year extension must be based on the reason. You cannot change mid-stream applying for the Non O based on retirement and the 1-year extension based on Thai child for example. Certain Immigration offices have rogue requirements that don't comply with what's stated. Which office would you apply?

I'm assuming you intend to apply for the Non O based on Thai child rather than retirement, as your posts are rather confusing as for which reason you intend to apply. I also have no idea where you got the figure of 20,000 BHT as a requirement For the Non O based on retirement, the financial requirement is 800,000 BHT. For the Non O based on Thai child, the financial requirement is 400,000 BHT. In either case, you must have at least 15 days permission of stay remaining for processing of the application. You can apply for a 30-day extension to give you more time. You posted further as I was writing; No. The financial requirement for the Non O based on Thai child is 400,000 BHT. I have no idea where you obtained the figure of 20,000 BHT. The requirements are listed in item 7 here: https://bangkok.immigration.go.th/en/issuing-and-changing-type-of-visa/ Where is the Mother? Was the child born in wedlock? You being named as the Father on a child's birth certificate alone is not sufficient proof if the child was born out of wedlock. Note, you must have parental responsibility and the child must reside with you as a condition. If you can advise on your marital status, we may better advise.

Should the VE revert to 30 days before your planned arrival, then a Non Imm 0 (90 days) + border hop and VE entry (30 days) + 30 day extension.

That suggests a Thai spouse or dependant Thai child. You can apply for the Non O visa from Immigration based on either of the above situations. You require 400K in a Thai bank on the day of application. You must have a minimum of 15 days permission of stay remaining. The annual extension requires the 400K to be seasoned for 2 months prior to the date of submitting the application.

According to a certain Bangkok tabloid, it's not a question of it will be reduced to 30 day VE entries again, it's just a case of agreeing and confirming an effective date.

So last minute, the Embassy is only open for 2 days next week. Good luck with the 'Holiday visa'.

The Thai Embassy London is closed 14th & 15th for Songkran, then 18th - 22nd for Eater. The OP should have planned better accounting for holidays, knowing he was warned to get a visa.