Fixed amount or percentage off, with a validity window.
Promo codes give money off at checkout: either a fixed amount or a percentage. Each code has a validity window and an active toggle, so you can end a promotion early without deleting the code. Manage them under Settings, Promo codes.
The discount is snapshotted onto each booking when it's used, so editing or ending a code later never changes bookings already made.
Email support@pillowcase.io with your campsite name or booking reference and we'll pick it up from there.