Contract Formation: A listing agreement is a contract for services. It is not required to be in writing in order for it to be enforceable.Learn what goes into a seller's listing agreement with a real estate agent and what you should know before signing one. If the contract is signed more than 48 hours prior to your desired listing date, they need permission to withhold from MLS. Money, the Agency must withhold its release until there is mutual agreement or an order has been administered of proper jurisdiction. XXI. – There are many blanks within Florida Realtors contract forms. A listing agreement is a contract between the seller of a home and a real estate agent. A listing agreement is a contract between homeowners and brokers that legally establishes how a realtor will find a property buyer on the seller's behalf. A real estate agent withholds documents from prospective tenants or buyers after signing them over to their clients and receiving payment for their services. Below are seven of the most important issues that the seller can negotiate in the broker's listing agreement.