A computer-implemented method performed by an issuer computer comprises receiving an authorization request for a transaction between a cardholder and a merchant using a first account identifier. A repository is searched for a preference set with the issuer by a cardholder to use a second account identifier when at least one transaction is received for the first account identifier. The transaction is authorized using the second account identifier in place of the first account identifier without knowledge by the merchant that the second account identifier was used. An authorization response is then returned to the merchant.