A signed lease is a legally binding contract. With Rocket Lawyer, you can create and sign your rental form online. While not all electronically signed documents are valid, these are most residential leases. Each state in the country has its own laws and regulations regarding the rental and leasing of real estate. If you are a landlord, it is important that you understand the laws of your state to ensure that your lease takes due account of all legal necessities for you and your tenants. Most states have laws that bypass it: real estate laws can be complicated, especially if your rental agreement contains provisions with legal jargon.