In a negative sentence， the word non must come before the object pronoun：

Non la mangiano. （They don’t eat it.）

Perché non li inviti？ （Why don’t you invite them？）

It is possible （but not necessary） to omit singular direct-object pronouns in front of verbs that begin with a vowel or forms of avere that begin with an h. However， the plural forms li and le are never omitted：

M’ama， non m’ama. [Mi ama， non mi ama.] （He loves me， he loves me not.）

Il passaporto？ Loro non l’hanno [lo hanno]. （The passport？ They don’t have it.）