I know this is an old question but the OP did not clarify the need for it.
I think it would be very good for both parties to know when the payments were made as the invoice only shows the invoice date but not payment date.
Say an invoice was issued for 1000 on 1/1//16
1/1/16 Amount credited 300.00
2/3/16 Amount credited 400.00
4/5/16 Amount credited 300.00
Balance Due 0.00
Why it is needed?
It would show both parties how long it took to pay off that invoice
It could be added as an option to show invoice payment summary.