In AlarmBiller, there are multiple ways of looking up payment by payment number.
1. Switch the search criteria from the top drop-down from Customers to Payment (then type the payment number and push the Enter key):
2. From the customer page under Payments tab.
The filter option (funnel icon) can be used to filter for exact payment number.
3. From the main payments section at the top, depending on how the payment was made, it can be found in different ways, accessing the correct tab.