Singapore PayNow QR Codes: EMV Payload and Cross-Border ASEAN Interoperability

1. Standard Basis

PayNow QR follows the EMV merchant-presented format. Currency is 702 (Singapore dollar) and country code is SG.

2. Proxy Types

PayNow supports several identifier types in the merchant account field: * UEN (Unique Entity Number) for registered businesses. * Mobile number for individuals. * NRIC or FIN for personal transfers. * Virtual payment address.

3. Interoperability

PayNow links to Malaysia DuitNow, Thailand PromptPay, India UPI, and other ASEAN schemes. Cross-border QR scans use the recipient's domestic identifier and convert currency at the point of transfer.

4. Dynamic Codes

Dynamic PayNow QR codes include an amount and a reference so the payer's bank pre-fills both fields. Always validate the generated payload by scanning with a Singapore banking app before going live.