Ignorance of the actual facts of the lease-option agreement between the parties or ignorance of the actual legal terms of the insurance and indemnity agreement does not make you an expert on either.

In the law there is a person  called "an officious intermeddler".

"An officious intermeddler is a person who voluntarily, and without request or pre-existing legal duty, interjects him-or herself into the affairs of another....,"

Other than seeking payment, I think you fit the definition quite nicely.