The balance on arrival is whatever remains of the fee after any deposit, settled face to face once she is inside, with banknotes, a card or crypto.
Two payments make up most reservations here. The first, the deposit, is sent before anyone leaves for the hotel. The second is the balance, and it is handled inside the room within a minute or so of her arrival. For a reservation that carried a deposit the balance is the other half of the ladder price. Where no deposit was taken, which happens only when a known guest wants one or two hours that same day, the balance is the entire fee.
Notes are welcome in euros, and equally in any other major currency, which the therapist takes at the exchange rate of the day. A guest who has come straight from the airport with dollars, pounds or francs in his wallet does not need to find an exchange desk at eleven at night. Card is accepted too, and so is cryptocurrency. Naming your choice in the thread beforehand saves a pause at the door.
Cash has one role only: it settles the balance. It cannot stand in for a deposit, since a deposit must be in place before the therapist sets out and banknotes can only reach her once she is standing in your room.
Settling at the beginning rather than the end is a small piece of hospitality. The practical matter is dealt with once, while everyone is still standing, and nothing about money needs to come up again before she leaves. Guests wondering whether anything beyond the fee is customary will find the local habit explained in the tipping guide. The total owed never differs from the rates on the therapist's own profile; the advance half is explained under deposit.
Tonight
Name the room, the hour and how long you would like her there. The reply comes back in about ten minutes with who is free.