The deposit, and the seven evenings that carry one
A deposit here is the first half of the fee itself, settled before she leaves, and seven kinds of booking carry one while a single kind does not.
It is not a sum held aside and given back at the end. It is half of the figure printed in the profile of the therapist you asked for, named in euro in the booking thread once the hour is agreed, and settled before she sets out.
Which bookings carry it
Seven of them: anything agreed more than twenty-four hours ahead; the eight hour block at any start time; any booking with two therapists; any room at Schiphol or an airport hotel; any peak date; any session of three hours or longer; and the first booking a guest ever makes here. One kind of booking carries nothing ahead, which is a returning guest asking for one or two hours the same day at a city address, and that one is settled entirely at the door.
How it is sent
Card is the ordinary route, with Revolut, Wise or cryptocurrency available to anyone who prefers one of them. PayPal is not accepted, and nor is a bank transfer. Cash cannot be a deposit, because a deposit is settled before she leaves and cash only moves once she is in the room. The exact amount and where it goes appear in the booking thread and nowhere else.
What happens to it afterwards
On more than twenty-four hours' notice it comes back whole. Inside the final day, while she is still at her own address, half stays and half goes back. Once she is on her way it stays in full, unless the hour is taken by another guest, in which case it is returned. It is never a penalty and never damages: it is fee already earned. The deposit page works the figures through, and cancellation and refunds sets out the scale on its own.