Make Previous Day Refund more Obvious

We have an account where they pulled up a previous day transaction for $1356 and refunded it.

Now the owner is asking me where the money is because he doesn't believe it's a refund. I told him you can tell it's a refund because of the R in front of the check number that day, but that's not enough.

When I send myself a copy of the receipt, it doesn't say REFUND anywhere. This refund also does not show up on the back office Refund report, apparently only same-day refunds show up there?

Just need a way to more clearly show that this was a past day's check that was pulled up and refunded.