What is the 4 digit card reference that shows on my 'Recent Transactions' and 'Statement' pages within Barclaycard online account servicing?

If you have additional cardholders on your card account, the last 4 digits of each card number can be used to identify which cardholder made which purchase. This is possible, as each cardholder has a unique card number. If you have no additional cardholders on your card account, then the 4 digit card reference number will always be the same, and will correspond to the last 4 digits on your card.

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