I've always been a bit confused about when to use the indirect object pronoun
le for persons. Specifically, is it necessary (or even forbidden) when specifying the person. e.g.
Voy a visitarle a Pedro.
I've also seen
la (the direct object pronouns) used in place of
le, for persons, and quite frequently so. What's up with this? Is it strictly correct? The only situation in which I can imagine this would be right is with the verb