A transaction card associated with a payment service may be purchased by a customer without the customer having a user profile with the payment service. The user scans a card identifier from the transaction card or from the transaction card's packaging using a mobile device, which then sends the card identifier to the payment service. The payment service may use the card identifier to generate a user profile that the payment service can automatically link to the transaction card. The user can track transactions made using the transaction card via the user profile.
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