These intrusions will continue to be a way of life until the associations (MC/Visa) and industry decide to start to heavly fine these merchants, acquirers and processors as there is no need to store full mag stripe data, CVC2 codes or customer info. My last alert contained about 17,000 account numbers. If you take a sample and review authorization data from the last 12-18 months, it is pretty easy to pinpoint the merchant that was 'intruded.' I will not give the specific name of the last large scale intrusion, but if you look at your accounts it was from factory stores all across the country for a high end clothing retailer. We do not shut every account down, but will monitor these numbers against our cases to track losses. You have to decide what is most cost effective, if you suffer losses on a couple of accounts, will it save more than what would have been spent to replace each card and use the staff to contact each customer.