I would like to get a 2-month tourist visa for a stay in Thailand starting on August 6. Before that, I will be in the capital city of Chile, Santiago, on June 20. Could I get my two-month visa at that time, and use it on Aug. 6, or do I have to get the two-month visa right before Aug. 6? Is there a time limit between obtaining the visa and actually entering Thailand? Thank you so much for your answers.