What's on your mind before you go?

Cambodia uses both the riel (KHR) and the US dollar (USD). Prices are often quoted in USD, and change may be given in riel (around 4,000 riel per 1 USD). Bring clean USD notes and some riel for small spending such as tuk-tuks and markets. Torn, stained or heavily creased USD notes are often refused, so check each note.
ATMs: most dispense USD only. Each withdrawal usually costs about 5 to 10 USD in fees, with limits of roughly 500 to 2,000 USD per transaction depending on the bank, so withdrawing once in a larger amount is better than several small withdrawals.
Cards: Visa and Mastercard work at larger hotels, restaurants and supermarkets in Phnom Penh and Siem Reap; some places add a surcharge of about 5%. Markets and small shops are often cash only.
QR: Cambodia uses KHQR. Foreign visitors can use the Bakong Tourist wallet from the National Bank of Cambodia to scan KHQR without a bank account; it needs identity verification and a prepaid balance. It is optional, and some users report card-linking problems. After scanning, check the merchant name and the amount.