Can DuitNow QR, PayNow and VietQR identify a returning customer?

Yes, for digital payers and with proper consent — the national QR rails carry a payer reference, which is enough to recognise a guest who has paid before. That is why these rails matter to retention and not only to payments.

DuitNow QR, PayNow and VietQR each carry a payer reference. With consent, that reference recognises a returning guest without a counter ask. This removes the cashier bottleneck for digital payers — and leaves cash payers behind unless a second capture method exists.

The three rails

Malaysia has the region's most complete state-built payment rail for small merchants. DuitNow QR reached 2.6 million acceptance points by end-2024 M-8 and transaction volume more than doubled to 3 billion in 2025, with Bank Negara describing the country as 'increasingly operating as a cash-light economy' M-9. Digital payment adoption exceeds 80% M-21. Account-to-account payments are forecast to reach 40% of online and 16% of point-of-sale value by 2030 M-8.

Digital payment adoption stood at 92% in 2025 M-11. PayNow and SGQR are universal; SGQR overlays multiple schemes on one code, and PayNow now connects cross-border to India's UPI, Thailand's PromptPay, Malaysia's DuitNow and Indonesia's QRIS M-28. The consequence for retention is that a Singaporean venue has the cleanest payment-based identity signal in the region — and the smallest cash gap, though hawker centres remain a partial exception.

VietQR is the interbank QR standard operated by NAPAS. NAPAS processes about 35 million transactions a day, nearly half of them VietQR, and QR payments grew 62% in volume and 151% in value in 2025 according to the State Bank of Vietnam M-10M-29. In 2025 NAPAS began rolling out a person-to-merchant QR standard, which is the rail most relevant to F&B M-10.

What a payer reference is, and is not

A payer reference is a stable token that lets a venue tell 'this person has paid here before' from 'this is a new guest'. It is not a customer profile, not a phone number, and not a marketing permission. Using it for retention requires consent collected from the customer, a lawful basis under the market's data-protection rules, and a way for the customer to see and leave the programme.

The cash gap

The limit is cash: in mamak, kopitiam and hawker formats a material share of transactions remain cash, and any loyalty system that only sees the payment rail is blind to them.

This is the practical reason a payment-only identity layer is not enough. The formats with the highest share of cash — street-side, hawker, kopitiam, mamak — are often the formats with the most regular customers. A retention system that only reads the payment rail counts the wrong half of the room, which is why QR check-in at the table and receipt capture matter alongside payment identification.

• Digital payers: recognise at payment, with consent, no counter ask.
• Cash payers: give them a self-enrolment route — a table QR or a photo of the receipt — that needs nothing from the cashier.
• Either way, enrolment must not depend on staff remembering to ask during a queue.