Exchanging British Pounds for Thai Baht

You find an old paper twenty-pound note at home, left over from a previous trip, and figure it'll come in handy for the next one. In Thailand, that plan can end in a declined note at the counter. The Bank of England has moved every pound sterling denomination to polymer (plastic) notes, and has progressively withdrawn legal tender status from the older paper notes within the UK itself. Here's what that means for exchanging GBP for baht.

Paper vs. polymer pounds — the practical difference

If a note is old paper stock and is no longer legal tender back in the UK, an exchange provider has a harder time putting it back into circulation — which is exactly why it may be declined or offered a worse rate. Polymer notes don't have this issue and exchange as usual. At a glance, the difference isn't obvious: both look like "real pounds," but their status isn't the same.

What happens at an EXFM office

EXFM (Fast Money Exchange) is licensed by the Bank of Thailand under No. MC225670007. GBP exchange happens only in person, at one of the offices in the Surin, Karon, or Rawai areas of Phuket, open daily 10:00–22:00.

You bring your passport and your notes, a manager checks them — including whether they're paper or polymer — and confirms the exact baht amount before you agree to anything. If you're carrying older paper notes, it's worth messaging a manager in advance to find out where you stand, rather than discovering it at the counter.

When it's worth confirming terms in advance

• Older paper notes — message a manager and describe what you have before assuming they'll exchange the same as polymer notes.
• A large amount — confirm the terms in advance rather than finding out once you're there.
• A longer stay (a common situation for British retirees in Thailand) — discuss a regular exchange schedule with a manager instead of an office visit each time for a small amount.