Abstract: A determination is made whether a purchase has been performed on a website for which a merchant and an acquirer have entered an agreement. At least one web-page associated with the website is equipped with at least one web-bug, which enables collection of information related to one or more customers visiting the website. If the web-page equipped with the web-bug is visited by a customer, a number of pieces of information from the web-bug relating to the customer are stored in a database. The number of pieces of information include a unique customer identifier and an identification of the web-page equipped with the web-bug visited by the customer. If a payment to an account associated with the website that includes the unique customer identifier is received from the merchant by the acquirer, then the stored number of pieces of information are retrieved from the database using the unique customer identifier as a key.