ESSENTIAL DUTIES AND FUNCTIONS. Accounts Payable and Recordkeeping. 1. Receives invoices to be paid, (supply and service vendors, credit cards, etc), check that appropriate staff has authorized that invoice is ok to pay, determine which fund (entity) is to be charged for the expense and the type of expense using chart of accounts, expense tables and input from supervisor and program staff. 2. Enter payment amount and fund and expense codes into a...