To avoid customs seizures and ensure operational safety, the machine must carry CE, RoHS, and FCC certifications. If the machine includes a cooling system (for high-end leather shoes or specific environments), ensure it uses eco-friendly refrigerants like R290 or R134a. For the North American market, UL or ETL certification is highly recommended. Additionally, check for anti-theft features, such as a reinforced steel cabinet and a shutter-protected delivery bin to prevent 'fishing' or unauthorized access.