1. LILY TIEN-YU LIU ISM 150 5/4/10 Visa Preventing Online Post-Transactions

2. Introduction Online credit card payments are used widely today Some companies trick online shoppers to sign up for online loyalty program that requires monthly fee Post transaction allows a merchant to transfer the information of previous transaction to others

4. Statistics

5. Visa Inc.’s Solution Visa Inc. took action to stop post-transactions People have to re-enter their credit card numbers instead of just entering email address A notification will show that the cardholders are making a second purchase

6. What can IT do more? Clear database of all the companies or websites that are cooperating with Visa online payment  Others cannot charge from the card Instead of the receipt or confirmation emails from the websites, Visa credit card companies can send another emails after charging  people will know what they’ve been charge immediately

7. Sources Greg Sandoval. “Visa targets online marketing 'scam‘.” Cnet News. April 27, 2010. http://news.cnet.com/8301-31001_3-20003489- 261.html?tag=mncol;txt Greg Sandoval. “Feds: Top e-tailers profit from billion-dollar Web scam.” Cnet News. November 17, 2009. http://news.cnet.com/8301-1023_3-10399880- 93.html Michael Arrington. “The Post Transaction Marketing Wall of Shame: Hundreds or Well Known Ecommerce Sites Rip Off Customers.” TechCrunch. http://techcrunch.com/2009/11/17/ptm-scams-scamville-rockefeller- senatehearing-wallofshame/