What are the immigration requirements for a UK passport holder on an O-A visa upon arriving in Thailand?

Upon arrival in Thailand with an O-A visa, you will need to ensure compliance with specific immigration requirements. First, when you transition from your hotel to a rented apartment, you must submit a TM.30 form to the immigration office within 24 hours of signing your lease. Additionally, your first 90-day reporting is due 89 days after your arrival date, which is essential to maintain your legal status in the country. The hotel will report your stay during your initial accommodation, but you, or your landlord, will be responsible for reporting your new address once you move.