A new Consumer Financial Protection Bureau (CFPB) report released this week found that due in part to the fact that most banks have adopted automated systems for assigning overdraft fees, what was once "an occasional courtesy" has become "a significant source of industry revenues," with it and non-sufficient fund fees now representing "60 percent or more of consumer checking account fee income," according to a press release from the bureau. Another contributing factor is that procedures and criteria for these fees vary by institution, some of which have complicated fee structures, transaction postings and overdraft coverage limits that make it difficult for consumers to anticipate and avoid these fees. What's more, the report found that customers who opt-in to overdraft coverage end up paying more in overdraft and non-sufficient fund fees, and are more likely to end up with involuntary account closures due to negative account balances. For more, including a link to the full report and fact sheet, read the full press release and CFPB Director Richard Cordray's prepared remarks.