Write downs of uncollectable debt for JPMorgan Chase credit cards fell in September, after an increase in August, the company said in a regulatory filing Wednesday.

Chase reported its net credit losses slipped to 7.78% of total balances in September, from 8.18% in August, and 7.95% in July. Chase's chargeoffs peaked for the year in January at a rate of 10.91%.

Banks wrote off record amounts of credit card debt in the past year as customers failed to make payments amid high unemployment. The overall rate in from April to June rose to 10.66%, according to the Federal Reserve, while chargeoffs typically hovered between 3% and 4% in the years leading up to 2008.

In a sign the positive trends should continue, Chase said the rate its customers with payments 30 days or more dipped to 3.82% in September, from 3.89% in August. The delinquency rate has fallen every month this year.

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