According to the official announcement by the Ministry of Foreign Affairs:

• Random Customs Inspections: Thailand Customs will randomly check inbound travelers. Each individual must carry at least 20,000 THB in cash, and each family must carry at least 40,000 THB (or equivalent currency, such as USD, TWD, etc.).

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• Compliance Required: All international delegation teams must strictly comply with these financial proof regulations. Failure to meet these requirements may result in deportation by customs.

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Thai government website : https://thailand.go.th/issue-focus-detail/001-01-027?hl=en&utm_source=chatgpt.com