A verbal, written, or inferred rental agreement can exist. A written agreement, on the other hand, acts as proof and summarises the contract terms that both parties have agreed upon. Once both parties are willing to the agreement’s terms and conditions, it cannot be changed without their mutual assent. With a time when tenancy conflicts are on the rise, it’s more important than ever to protect your property by creating a detailed rent/lease agreement and documenting it at the local sub-office. registrar’s Registering a tenancy contract makes it legally enforceable and protects both parties’ rights in the event of future disputes.