Learn French: Le destinataire est là, donc il la lui donne personnellement. - The recipient is there, so he is giving it to him personally.

When a sentence has two third-person object pronouns, the direct object (le, la, or les) always comes before the indirect object (lui or leur). Since he is giving "it" (la) "to him" (lui), the correct order is la lui donne.

What does la stand for here, since le destinataire is masculine?

The pronoun la (it) refers to the item being given, not the recipient. Although the item isn't explicitly named in this sentence, the feminine pronoun tells us it must be a feminine noun (like la lettre or la carte).

How do we know to use lui for the recipient?

The verb donner (to give) requires an indirect object for the person receiving the item (you give something to someone, which is donner à quelqu'un in French). The indirect object pronoun for "to him" or "to her" is lui.

Does est là mean "is there" or "is here"?

While ici strictly means "here" and là means "there", everyday French often uses là to describe someone's presence in the immediate area. In this context, est là usually translates to "is here".