The advance payment serves to secure the research effort already incurred, for example for obtaining documents and scheduling the inspection appointment.
Reputable providers disclose the exact payment terms transparently in the offer itself, so that no surprises should arise when the final invoice is issued.
For court-appointed experts, on the other hand, remuneration is paid through the court's cash office in accordance with the Act on the Remuneration of Experts (JVEG), irrespective of individual payment agreements.
For more extensive orders, such as for larger commercial properties, staggered partial payments in line with processing progress are also common and provide planning security for both sides.
Before concluding the contract, clients should receive written confirmation of the agreed payment terms in order to avoid later misunderstandings.