rightful rightful /ˈraɪtfəl/

adjective

1. () Legally valid  ( rightful )
   legally valid
    A rightful inheritance
   a rightful inheritance
   
2. Having a legally established claim  ( lawful , rightful , true )
   having a legally established claim
    The legitimate heir
   the legitimate heir
    The true and lawful king
   the true and lawful king