I would like to request a feature, where you can send an invoice receipt once a payment has been made.
I asked about that in the post:
How do I send an invoice receipt.
Towards the end of the post, I have explained how it works in WaveAccounting.
This would be very handy, if a customer asked for a receipt or you forgot to send a confirmation when the invoice was recorded.
It would be handy to have a link to send an email notification to the client, within the invoice dashboard.