A government issued passport.
Passport and permit
If you are an American citizen all you need is a government issued picture ID like a drivers license
nothing - but you will need a U.S. authorized document to get back into the U.S.
I have a California Probate document that I need to notarize. Can I have it notarized in the state of Virginia instead of California and still be legally binding?
no visa at all
Your passport is the only document you need when visiting Mexico for tourism purposes.
What kind of Document do you need to post
California and Mexico share a border; it's literally one step from Mexico to California. If you're looking for flight times, you'll need to specify which cities.
Contact your government offices for the answer.
No, Mexican citizens can't get divorced in California if they were married in Mexico. One of the parties would need to be an American citizen.
a poo loyer
You will need your passport. If you are a Guatemalan national, you will also need a visa issued at the Mexican embassy in Guatemala City.