Select the Pay button to submit a payment in Invoiced after a bill has been approved. The vendor determines the available payment options. Depending on the vendor's settings, you can use an existing payment source or add a new one. After you submit a payment, you will see the payment reflected in your account, and the bill status will change to Paid. You can also select Mark as Paid on a bill to change it to a Paid status. This is useful if you have submitted a payment outside of Invoiced. This does not update the invoice in the vendor's account. Vendors should record the payment in Invoiced once they receive it.