In Clear Books, bills can be marked as paid with a few clicks using the Record Payment method. This feature is enabled in Settings > Configure system > Toggle features > Invoicing & Expenses > Toggle on Record payments directly from the unpaid invoice page.
Navigate to Purchases > Bills > Unpaid.
Click on the bill number of the bill you would like to pay.
Fill in details of the 'Record payment' form in the bottom right corner of the bill and click the Pay button to complete.
This feature will only list bank accounts in the home currency or in the currency of the invoice. To pay for an invoice in a different currency, please use the manage money options on the Money > Bank accounts menu