Google Chat is a communication software developed by Google built for teams that provides direct messages and team chat rooms, along with a group messaging function that allows Google Drive content sharing.
Surface unpaid bills that still need receipts or approval.
Your payables lead gets a clear chat alert when a near-due bill lacks a receipt or still needs approval, with links and a question to resolve.
Escalate undecided bills with receipts before they come due.
Your AP lead gets the receipt link and deadline in a private chat. The original bill shows the escalation too.