Deposit: the first half of the fee
A deposit here is not money parked somewhere and given back; it is the first half of the fee itself, sent after the hour is agreed and before she leaves.
The word carries the wrong picture for most people, so it is worth correcting at once. Nothing is held aside in a pot to be handed back when everyone has behaved. What goes ahead is simply the first half of the figure attached to your booking, worked out from the numbers printed in the profile of the woman you asked for. The second half is handed over at the door.
When it is asked for
On seven kinds of booking: anything fixed more than a day ahead, the eight hour block, any booking with two therapists in it, a room at Schiphol or an airport hotel, a peak date, three hours or longer, and the first booking anyone makes here. One case carries nothing at all in advance, which is a returning guest asking for one or two hours at a city address later on the same day.
How it is sent
Card first, with Revolut, Wise or cryptocurrency for anyone who prefers one of those. PayPal and bank transfers are not used. Cash cannot do this job for a plain reason of sequence: the first half is settled while she is still at home and cash only moves once she is in the room. The sum and where to send it are written in the confirmed thread and nowhere else at all.
Getting it back
More than twenty-four hours before the booked time, all of it returns. Inside the final day, with her still at home, half of it stays and half comes back. Once she has set out, it stays, unless the hour you gave up is taken by someone else, in which case it is returned whole. The deposit and cancellation page works through the figures case by case.