No, an invitation letter is generally not required for a Thai tourist visa application. However, if you plan to stay with Thai relatives or friends, a letter of invitation along with their Thai ID or passport copy, and a copy of their Thai house registration might be required. Additionally, if you are staying with a foreign national in Thailand, you may need a copy of their valid visa, work permit, and accommodation ownership documents.
Here's a more detailed explanation:
General Tourist Visa:
For typical tourist visa applications, you'll typically need to provide proof of accommodation, such as a hotel booking, rather than a letter of invitation.
Staying with Thai Relatives/Friends:
If you plan to stay with Thai relatives or friends, you'll likely need a letter of invitation from them, along with their Thai ID card or passport copy, and a copy of their house registration.
Staying with a Foreign National in Thailand:
If you are staying with a foreign national who is residing in Thailand, you may need a copy of their valid visa, work permit, and accommodation ownership documents.
Other Potential Requirements:
Depending on your nationality and specific circumstances, you may also need to provide other documents like proof of financial means, return tickets, and a passport photograph