There is a small post office in Mui Ne, east of the Ham Tien Market.

Banks can issue cash advances on credit cards (Visa and Mastercard). The Industrial and Commerical Bank is next to the Tropico Resort (it now has a 24-hour ATM on site) and the other bank is near the Swiss Village Resort--are usually closed Saturday and Sunday. There's a new 24-hour Vietcom ATM now next to the Saigon Mui Ne Resort. The Industrial and Commercial Bank in Phan Thiet (261 Tran Hung Dao St.) may be open Saturday Mornings. Banks close at 4 or 5 pm. This means that if you arrive in Mui Ne on a Friday, well it sucks to be you. Actually, tour offices like Hanh Cafe can give cash advances for higher rates.