Several payments and financial posts within as money mistakes often leave impacting memories for those involved. As a dotcom kid who founded and wrote the core

Several payments and financial posts within as money mistakes often leave impacting memories for those involved. As a dotcom kid who founded and wrote the core systems for several payment processing companies over the decades I recall 2005 when a company using one of our partner banks was breached. This was CardSystems, the largest publicly known breach at the time, and I was tasked to perform a full code review of their systems to find any issues. The payments gateway contained a valid crc nontest card number compiled into authorization logic that had no deployment switching control and recorded no transaction information when that card number was used. Any merchant using CardSystems under this payment gateway suffered unknown losses from approved transactions that were never recorded into any system. I postulated who had done this but federal law enforcement around the breach buried this and other key discoveries I had found since the company was being dissolved and my findings were therefore deemed immaterial.