non-binding
adjective /ˌnɒn ˈbaɪndɪŋ/
  /ˌnɑːn ˈbaɪndɪŋ/
(also nonbinding especially in North American English)
 - that not does not have to be obeyed according to the law- The result of the referendum is non-binding.
- He proposed a non-binding contract.