A Lease Agreement Cancellation is a formal document that serves as proof of termination of a lease between two parties. It outlines the terms and conditions of the cancellation, such as who is responsible for any costs associated with terminating the agreement, and whether the tenant must vacate the property immediately or be allowed a period of time to do so. The document should also state whether the tenant is entitled to receive any refund of rental payments already made. A Lease Agreement Cancellation is the only legally binding way to terminate a lease, and should be treated with care.