It would be a helpful detail to include at the bottom of invoices, where the customer can see the logged payments, if the last 4 digits of the card used to pay were displayed along with the total and the date submitted.

There have been numerous times where a client has reached out having had a project paid for via multiple deposits (group orders where people are contributing certain amounts) and requested that information. It's simply not easily available and would provide additional clarification on transactions.