Handling Overpayments / Unapplied Cash

Hello,

We are new to X3 and I cannot seem to find any documentation on how you handle customer overpayments.

I believe you'd add a second line to the check receipt (with the 1st line being the application to the invoice). Do you use attribute "Prepayment Receipt" ? That appears to make the correct journal entries and shows on the customer aging. I just don't want to start down the wrong path on this. Thanks in advance for the help!