A more thorough explanation:

Definition: A commissionaire is an agent who is authorized to act for or in place of another person or entity, known as the principal. The commissionaire is responsible for producing an effect or result on behalf of the principal. They may be authorized to transact all of the principal's business of a particular kind or in a particular place. The commissionaire may bind the principal by the contracts they make, but they do not bind themselves.

Example: A real estate agent is a commissionaire who represents a buyer or seller in the sale or lease of real property. They are authorized to act on behalf of their client and negotiate the terms of the sale or lease. The commissionaire is responsible for producing a successful transaction that meets the needs of their client.

Explanation: The example illustrates how a commissionaire acts on behalf of a principal to produce a result. The real estate agent is authorized to act on behalf of their client and is responsible for producing a successful transaction. The commissionaire is not bound by the contracts they make, but they are responsible for ensuring that the transaction meets the needs of their client.