Customer/Client appreciate getting a lovely message when they make a payment or just a confirmation etc via email or on-screen message (with option to save) for book keeping record. I would suggest email the customer once payment is received as below;
You just made our day!
Thanks for the payment.Payment details are right below:
Invoice # : %InvoiceNumber%
Date : %PaymentDate%
Amount : %PaymentReceived%
We love having you as our customer and look forward to working with you again.