A system and method for securing a recurrent billing transaction using a marked proxy code is disclosed. The marked proxy code includes a merchant system marker which is assigned to the merchant and a proxy code assigned to a consumer. An account issuer assigns the proxy code to the consumer and assigns...http://www.google.com.au/patents/US7650314?utm_source=gb-gplus-sharePatent US7650314 - System and method for securing a recurrent billing transaction
