On 8 October, the Revenue Department and eight agencies (including DSI, the Business Development Department, Immigration, Land Department and AMLO) searched three Bangkok sites over about 600 companies linked to naturalised Thai citizens, flagged for possible under-filed tax. Not filing a tax return is a legal violation and can affect business licence renewals. Tax evasion with intent carries 3 months to 7 years in prison and fines of 2,000 to 200,000 baht. Check that your own company's filings, returns and ownership records are complete and current. The public can report tax evasion via the Revenue hotline 1161 or the department website, with whistleblower protection.