A rental-purchase agreement may not contain: A confession of judgment; A negotiable instrument; A security interest or any other claim of a property interest in any goods except the rental property delivered by the lessor pursuant to the rental-purchase agreement; A wage assignment; A waiver by the consumer of claims or defenses; or A provision authorizing the lessor or a person acting on the lessor’s behalf to enter upon the consumer’s premises or to commit any breach of the peace in the repossession of rental property.