Here's the example of Statement of Account I sent to the customers on a daily basis.

And this is the Billing monitoring I always update  after sending all the Statement of Accounts. I also put a remarks if the customers already paid the amount indicated on the SOA. This will help the client check the summary of all the SOA sent everyday.

This is the OR monitoring where I update on a daily basis reflecting the payment of the customers made everyday. This help our client check the daily transactions that we are receiving.

This is the Payment Monitoring were all the payments made by the customers were consolidated in a one spreadsheet so the client can check it easily.