How Does BillFlash Work? Simply You upload your existing business software's statement file to BillFlash through your internet browser 24x7. You're done in 5 minutes! We produce your statements at one of our regionally located, state of the art processing centers. We mail your statements through the US Postal Service by the next business day. Payers receive timely, high quality statements in their mailboxes. Through BillFlash your statements join more than 10,000,000 other critical statements produced each month at our facilities.