Paymode, the largest B2B (business-to-business) payment network in the United States, connects buyers to more than 600,000 validated and authenticated suppliers. Last year, Paymode (operated by Bottomline) processed more than $500 billion in card, ACH and paper check payments without any fraud tied to account takeover or payments directed to bank accounts managed by criminals. American Express has become the latest company to offer Paymode as a noncard payment option to buyers that use its commercial card products. Amex joins JPMorgan, Bank of America, US Bank, TD Bank and other, Fifth Thir...