Contact the consulate of Mexico in your country and make sure if you require visa or/and vaccination card
The Mexican Society of Materials only issues letters of support for visa, once the author has registered and paid their registration fee.
Your letter for visa application must be received at least 10 days before your citation at the consulate.
Countries that require a visa to enter Mexico: here
Countries and regions that do not require a visa to enter Mexico: here
Links to Mexican Embassies and Consulates around the world where you can find out visa requirements, documents needed, make appointments for visas, etc. in different languages:
Mexican Embassies: here
Mexican Consulates: here