The first thing I would do is contact the listing agent and explain why you want to cancel. The Release and Cancellation of Contract for Sale and Purchase may be used in the event parties agree to cancel an executed contract.Suggests Realtors draft the Release and Cancellation of Contract document. Detailed information about canceling listing agreements and contracts, calculating time periods and other common real estate scenarios. There is no unilateral right to terminate the Exclusive Right of Sale Listing Agreement unless the agreement so provides. Today we are going to be going over a release and cancellation of contract form. You simply tell her you want to cancel the Listing Agreement. There is a form you must fill out to do so. Terra Mar, Florida Flat Fee MLS Listing. List your home for sale in the Multiple Listing Service for Terra Mar Florida.