from the start, tom has to perform an action (fix windows), in a specific time frame, with specific materials. but in theory, when talking about responsibilities within a contract, payment is not included. let’s say homeowner layla puts her house on the market in an open listing, and real estate agent alex brings an offer that layla accepts: now she has to pay alex a commission. speaking about unilateral contracts… there’s absolutely no contract to be made when you use the official real estate agent directory® to search for a local real estate agent!