What if there is a problem with the property I choose or the seller changes his mind?

If a problem arises, for example if the search reveals something previously unknown, then the deposit is automatically returned. Should the seller decide not to sell after the deposit has been paid, then he must return double the amount of the deposit to the buyer.

If the buyer changes their mind after the deposit has been paid the deposit is not returned. The deposit really acts as a mutual commitment between the vendor and the buyer.