Re: [browser-payment-api] Different card schemes have different mandatory field requirements (#9)

Unfortunately that's not quite right. Expiration month, expiration year, and cardholder name are all optional fields for a UnionPay card. As it stands the spec therefore won't work for basic card payments in mainland China (or Russia, for that matter, where UnionPay cards are also issued).

The only required field you can have for a basic card payment is the PAN.

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Reply to this email directly or view it on GitHub:
https://github.com/w3c/browser-payment-api/issues/9#issuecomment-195659285