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postalCode read-only property of the
PaymentAddress interface returns a string containing a code used by a
jurisdiction for mail routing, for example, the ZIP Code
in the United States or the Postal Index Number (PIN code)
var paymentPostalCode = PaymentAddress.postalCode;
DOMString which contains the postal code portion of the address. A
postal code is a string (either numeric or alphanumeric) which is used by a postal
service to optimize mail routing and delivery.
Various countries use different terms for this. In most of the world, it's known as the "post code" or "postal code." In the United States, the ZIP code is used. India uses PIN codes.
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