ACH Alert announced Thursday that Trustmark National Bank of Jackson, Miss. has chosen it for its automated clearing house network fraud prevention services.

The Chattanooga, Tenn. vendor said it blocked roughly $100 million in attempted fraudulent transactions last year.

"We are confident ACH Alert's fraud protection service, called A.L.E.R.T., will help to continue to strategically position Trustmark National Bank on the leading edge of fraud protection in the markets we serve," said Christopher Styga, the bank's senior vice president of corporate treasury services, in a press release.