“Universal Default” is when your credit card company adjusts the terms of your loan because you “defaulted” with another company. In reader P.’s case the “default” was a Blockbuster video that his friend forgot to return. Discover Card took this opportunity to double P.’s interest rate. When he tried to fight it by closing his account, it launched him into a 2 1/2 year legal battle with Discover, a collection agency, and now the credit bureaus.