Personalisation of physical card PINs
As a result of customer reports encountering declined purchases when a card PIN is updated after being dispatched, we have decided to deprecate the set PIN feature. Instead the card PIN can only be personalised when upgrading a virtual card to a physical card.
A new optional field named pin has been added to the /managed_cards/\{id\}/physical/upgrade POST API endpoint which can be used to specify a personalised PIN. If this field is not included in the request, a random PIN will be assigned to the card.
The /managed_cards/\{id\}/physical/pin/set POST API endpoint is now deprecated and will be removed in an upcoming release.