Bills & payments are how you settle what you owe vendors — every received purchase order becomes an unpaid bill, and you mark it paid one PO at a time once the ACH clears, the check goes out, or the card is run.
In the POS mode, open the Orders left tab, then the Vouchered top tab — that's your accounts-payable queue, the list of bills sitting unpaid on your books.

A vouchered PO is a recorded vendor invoice waiting to be paid. The Vouchered top tab is the live "what do I owe" list — every row is a bill, sorted by when it was vouchered, showing the vendor, the location, the invoice total, and the count of products on the order.
This is the one place to track payables: there's no separate accounts-payable list elsewhere in Rundoo. Because each row is a real PO, every payable also carries the underlying invoice (date, due date, invoice number) and the line items behind the bill. See Vendor invoices for how a PO becomes a vouchered invoice in the first place.
Ways to work the queue:
Filter control above the table to narrow to one vendor when you're cutting a batch of payments.Due date from the invoice tells you what's overdue.Expand all control at the top right shows totals on every row at once for a quick scan.Click into a vouchered PO. The header shows the invoice panel on the left (date, due date, invoice number, vendor pay-to) and the line items on the right. Two action buttons sit at the bottom:

Revert voucher sends the PO back to Received if the invoice was wrong and needs editing — see Vendor invoices.Mark as paid records that this bill has been settled. Click it.The Mark as paid modal opens with the vendor, amount, and location pre-filled from the invoice. Date defaults to today; change it if you're back-dating a payment your bookkeeper already cut. The General ledger account defaults to Accounts payable — leave it unless your chart of accounts routes vendor payments somewhere else.

The remaining decision is Payment method. Pick how the money actually moved: