Wells Fargo is now saying 3.5 million customers were affected by its fake accounts scandal, a dramatic increase from the 2.1 million accounts it originally estimated.
After the bank acknowledged in September 2016 that its employees opened 2.1 million accounts without getting customers' permission, news reports showed that problems at Wells started before 2011, when Wells said the issue began.
The bank then agreed to look for fake accounts going back to 2009.
Wells plans to give an additional $2.8 million in refunds to the affected customers.
Separately, Wells also found 528,000 customers were signed up for online bill pay when they did not ask for it. The bank will give $910,000 in refunds to those customers.