A disclosure is a statement or appendix to a sales contract that discloses information about the property. As a general rule, disclosure is only appropriate if required by local, national or federal law. The contract of sale for the purchase of real estate is a contract of legal quality. The contracting parties are the seller(s) and the buyer(s). The treaty is called a bilateral agreement between the parties. It is a legal form that binds both parties to the agreement defined in the document. It guarantees clear conditions when buying, exchanging or allocating real estate from one party to another in any form. The document defines the reflections within the text. This concept relates to the financing on which the parties agree during the negotiation process.