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# PassKit updates

Learn more about changes to PassKit.

## Overview

Browse notable changes to <doc://com.apple.documentation/documentation/PassKit>.

## June 2024

- Use `merchantCategoryCode` to add an optional Merchant Category Code (MCC) to your payment transactions.
  Add this property to the <doc://com.apple.documentation/documentation/PassKit/PKPaymentRequest> object to categorize the type of goods or services provided by the merchant.

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