Currently, payment receipts just show the date paid with the total paid, underneath the invoice total, and then underneath that 'Payment total', and 'Payment due'. I think this could be clearer for the clients. A heading such as: 'Date paid' with the date, 'Amount paid', a 'Paid by' (as you get on the email version of the payment receipt), and then the 'Payment total' would be really useful! The 'paid by' is perhaps less important, but I think there should be some indicator as to what the date refers to.