Is an appointment required or can I walk in at the Ministry of Foreign Affairs in Pattaya?

The original question mistakenly references the Ministry of Foreign Affairs in Pattaya, while community comments clarify that the MFA is located in Bangkok and suggest that the inquiry is likely about immigration services in Pattaya. Therefore, the question is rephrased to focus on whether appointments are necessary or if walk-ins are accepted at the immigration office in Pattaya.