Owe somebody money — a cancelled class, a goodwill gesture? Add account credit on their member page. It is real money, comes off automatically the next time they book a class or buy a pass, and every movement is listed with the reason you typed.
Prerequisites
Members → click the person → the Money tab. "Account credit" sits between "Class credits" and "Grant a pass". It shows the balance in dollars — deliberately, because "Class credits" just above it counts CLASSES, not money. If you see a dollar sign, you are in the right place. A non-zero balance also shows as a chip in the header, so you can see they are owed something without opening the tab.
Type the amount, type a short reason ("Sound bath cancelled", "goodwill"), and press "Add credit". The reason is required: it is what the history shows, and a balance nobody can explain six weeks later is exactly what this is meant to avoid. "Remove" takes credit away the same way, and can never push a balance below zero.
The next time that member books a paid class or buys a pass, the credit comes off the price automatically — no code to type and nothing to remember. If it covers the whole thing, no card is asked for at all and the booking simply completes. The class is paid, so it does not also use one of their class credits or a pass visit. If it covers part, they pay the difference by card as usual.
Every movement is listed under the balance, newest first: what was added, what was spent, and the reason. It is the same list the member's money passes through, so you can answer "why do I have $40?" without leaving the page.