Good afternoon,

I am visiting Chiang Mai with tourist visa and I have only one month vacation. I want to change my visa to Non-immigrant O visa. I have some questions about the required documents:

1- Do I need a tenancy contract for one year or just TM30 registration receipt from a hotel room with one month period of stay?

2- is one month enough for the process to get the 90 days Non-immigrant O visa?

Thank you so much for your help