Dear [Name],

We are pleased to inform you that we have successfully received your payment of [payment amount] today on account [account number]. We would like to thank you for your prompt payment and we hope that we can continue to provide you with the high quality services that you have come to expect from us. If you have any questions, please don't hesitate to reach out to us. 

Sincerely, 
[Your Name]
Dear [Name],

We are writing to inform you that we received your payment of [payment amount] today on account [account number].
Componi un'e-mail a un cliente su un avviso di pagamento.