A car lease agreement is a legal contract between you and the leasing company. In many cases, leasing a car is similar to renting an apartment.A friend of ours has brought to our attention that they are legally not allowed to change the contract once signed in any way. The "lease" is a legal agreement between you and the leasing company, specifying the terms and conditions for leasing a specific vehicle. The dealer reached out to me asking to resign the contract because they mistakenly wrote it with a 15k mileage allowance instead of 10k. Before you sign, make sure you understand every part of your auto lease contract. Let's take a close look at a real vehicle lease agreement. You must file Form RUT-25-LSE to report the transaction and pay the tax. The reason for rewriting: "buyer and cobuyer signed in the same line". If you choose this route, the dealership may be willing to cut you a deal on the buyout price.