@Shalav PayPal in cooperation with card issuers and banks will update a customer's card they have on file with PayPal automatically where applicable. I don't know how thorough they are but hopefully when cardholders are sent new cards update their info as indicated in the documentation that came with their new card. Or when the payment fails due to expired card, PayPal will notify the subscriber of the failed payment and your customers will contact you or update their info then.
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