My advice would be to fly to a neighboring country and arrange your DTV from there (Vietnam, Laos, Malaysia,Indonesia). First of all its much more practical and cheaper to arrange your DTV from there. Currently I have applied for my DTV Thai Cooking course through House of Taste in BKK which offers a very professional service for DTV, can highly recommend! For flight confirmations you can use
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but to be honest i would highly recommend partnering with house of taste with the DTV support package and they can help you with all your questions and experience to minimize the risk of rejection!