A method and a system for processing an online financial transaction executed at least partially by a computing device coupled to a communications network, comprising a rule-module nexus for processing an online financial transaction, an on-line verification platform, an online user account registry, wherein the on-line financial transaction comprises a payor-payee transaction, wherein the user is the payor and a merchant is the payee, and comprising at least one of the following: (a) the user and the payee are each directly and independently connected to the rule-module nexus during simultaneous logon sessions via a communication network, and wherein upon the user clicking on a website widget of the payee, the rule-module nexus transmits secure socket layer data directly to the user interface apparatus for display to the user via a pop-up window, without requiring application programming interface integration with a website of the payee and without requiring a form re-direct of the user away from the website of the payee; (b) the buyer, the seller, and the acquirer are each directly and independently connected to the rule-module nexus via a communication network, not necessarily during simultaneous logon sessions, and wherein the rule-module nexus hibernates the financial transaction pending verification the user, invocation of a rule-module, selection of the financial account, and submission of the selected financial account to the acquirer.