This confirmation ("Confirmation") confirms the Transaction between Calpine Energy Services, L.P. ("Calpine" or. Here's an example, and fill in the blank where appropriate: "Dear Client, Your payment of ______ has been successfully processed on ______.How to fill out the Confirmation of Payment Received Letter? 1. Enter your company name and contact information. 2. This Confirmation confirms the transaction between City of San José, a California municipality. After you submit your payment, you will see a payment confirmation screen. It will contain your payment confirmation message. Get paid faster with these 11 effective email templates for collecting your accounts receivable. Streamline your collections process today! When will I receive my Orientation Confirmation Letter?