If asked, it is normally sufficient to provide booking confirmation for a few nights, up to a week.

@Nick ********

probably cancelled because of wrong biodata

Yes, you'll normally get the extension on the same day for a retirement-based extension. In some cases, during high season, you might need to pick up your passport the next day.

Probably nothing for one day anyway. There's no black mark, but in general for missed reports, you could risk a 2000 baht fine next time you report or need a service from immigration.

Greg Alexander Individual embassies and consulates still apply their own visa practices, even though the application process has been standardized through the e-visa system. Their internal guidelines did not cease with its introduction, and variations in practice still exist.

Greg Alexander as said the requirements are listed together. For single it’s 20K and multiple it’s 200K.

@Luit ****************

Why is that? There are thousands of Muay Thai gyms in Thailand, so you can simply say you will attend one once you arrive. But by all means, if you think it is better to say that after completing a Muay Thai course you intend to spend the remaining five and a half years on the DTV purely on holidays, then go ahead.

SunnyHamster3652 I agree with that. That said, we do see from time to time that people are questioned at entry, and that is a perfectly natural explanation. You don’t need to say you will continue studying Muay Thai, only that you intend to practise what you have already learned. That comes across as entirely reasonable.

@John *********

No, I don’t know, but there could possibly be a few more without me having a overview. It is listed together with the requirements for single entry and the 20,000 baht requirement.

Edit, there’s is a 6 000 Euro requirement for multiple under the Thai embassy in Madrid and also as I remember a 5000 Euro requirement under the Thai embassy in Rome.

You don't need to register for another course if you already have a 5-year visa. Just tell them you're continuing to practice Muay Thai if any questions asked.