Estate planning errors are found far more often than families tend to expect, and the consequences are usually felt at the worst possible time. A will left unchanged after a second marriage, a power of attorney signed without proper advice, a beneficiary designation that was never filled in; these are the kinds of oversights that quietly build into serious problems. As it turns out, many of these mistakes aren’t made out of carelessness. The process simply wasn’t explained clearly enough, and that gap tends to cost families more than money, though exactly how much more is something that varies, quite a bit, from one situation to the next.