If customers purchase the dress, the $482 fee will be dropped from their final bill, but if not, their deposit is not refunded.
"to give back, restore," early 15c. (earlier "to pour back," late 14c.), from Old French refunder "restore" and directly from Latin refundere "give back, restore, return," literally "pour back, flow back," from re- "back" (see re-) + fundere "to pour" (see found (v.2)). Specifically of money from 1550s. Related: Refunded; refunding.
"a return of money paid," 1782, from refund (v.).