CheckFree shares jumped 12% Monday, and were still up 8% Tuesday, as Bank of America’s largest bill-paying service looks to be adding Fleet to its customer line amid the pending buyout by BofA.

With Bank of America’s success in the online bill-payment industry and the possibility of Fleet greatly increasing CheckFree’s business, the shares hopped $3.13 to $28.90, and traded as high as $29.90 on Nasdaq, Reuters reports.

The Monday announcement that Bank of America would buy FleetBoston, creating the second-largest bank in the United States, is said to be a $47 billion deal. CheckFree, which saw a narrow loss last quarter, seems to be in line to benefit from the buyout.

JMP Securities Analyst David Scharf told Reuters of CheckFree’s future: "Assuming the accounts [Bank of America] acquires from Fleet are ultimately converted to their system, Bank of America’s online bill-paying customers should increase by 20% -- which should ultimately help CheckFree’s volumes."

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