Where can I exchange older-series US dollars in Nha Trang?

Where it worked: in September 2026 a traveler, following a tip from the discussion, exchanged his old-series US$100 notes for dong at a tobacco seller. The rate was 2.4 million VND per US$100, lower than for new notes (he noted the old notes had also been cheaper than new ones when he bought them from a bank). He warned against bringing a lot of dollars: to pay out dong for US$200 the seller had to run to the neighbours for cash.

Gold Coast exchange office: in September 2026 a traveler exchanged dollars there at a rate she recalled as "about 2565". While she was there, a man was refused even with a new, uncreased US$100 note, and she herself was asked for a passport — without it she could not exchange. If you are changing large notes, bring your passport and expect strict checks.

Banks: in early September 2026 a traveler visited four banks — Agribank, Vietcombank, Techcombank and MB — and none of them accepted old-series US$100 notes. This is one person's experience at specific branches, but these banks are not a reliable option for old notes.

The same day he also tried SeABank and Vietbank, plus a couple of small shops and a jewellery shop — none of them took the old dollars.