depends how strict they are. Maybe they ask for just the booking. Maybe they ask for proof of payment to the hotel, who knows! Id just make the trip as HCM nice anyway and it got to be cheaper than the $340 u might get ‘scammed’ out of if they find out u not in HCM. Up to u bud
just confirmed Id get yourself to HCM and book a hotel there so u can send them the booking. Then u can claim u arrived to Hanoi but travelled to HCM as thats where u would be when application was processing. Whether they accept this or say u were in Hanoi when applied so application is invalid, who knows! U can also email Hanoi to ask I guess but then u are letting them know the issue so up to u!
surely someone can arrive to HCM and show that stamp if applying in Hanoi but then travel to Hanoi and maybe show hotel booking in Hanoi? Or vice versa obv!