A more thorough explanation:

KOOPBRIEF

A koopbrief is a legal document used in Dutch law that serves as a deed of sale.

When a person buys a house in the Netherlands, they will receive a koopbrief from the seller. This document outlines the terms of the sale, including the purchase price, any conditions of the sale, and the date of transfer of ownership.

Another example of a koopbrief is when a person buys a car in the Netherlands. The seller will provide a koopbrief that includes the make and model of the car, the purchase price, and any warranties or guarantees that come with the vehicle.

A koopbrief is a legal document that serves as proof of a sale in the Netherlands. It outlines the terms of the sale and is signed by both the buyer and the seller. The examples illustrate how a koopbrief is used in different situations, such as buying a house or a car.