Look for the "Facturación" tab in the main menu.

Modern tickets often have a QR code printed on them.

Periférico Poniente Km. 36 + 205, Col. Las Julias, San Luis Potosí, SLP. Hours are Mon-Fri from 9:00 AM to 5:00 PM. Potogas - Distribución de gas LP en San Luis Potosí

: Mon–Fri (8:00 AM – 7:00 PM), Sat (9:00 AM – 2:00 PM). Plaza Líbano (Walmart) : Carretera México, Local 6