The rest of the lawyer`s fees can be paid later or after the end of the procedure. They may be concluded by way of a success fee or other type of royalty agreement. A retainer agreement aims to protect both the client and the lawyer. Once signed, the lawyer can no longer represent anyone with opposing interests in the same case. The agreement also ensures that the lawyer is paid for the costs incurred by legal advice, representation or related services. (1) A general retainer which is a royalty for a given period and not for a given project. Although no specific representation is envisaged, the client pays for the availability of the lawyer during the period indicated. .