Addressee

They confused the names of the sender and the addressee.

If you calmly look at the reply you sent to an email, you'll find that it'll have "you" all over it. While you may use the pretext that you're just working with whatever information the addressee gave you, in the end it's just all about yourself. This is wrong. Let's be a little more careful, shall we?

Send a registered letter to be sure that it will reach its addressee.

The name of the addressee on the stamped envelope was illegible.

On the envelope was stamped "Addressee has moved."

The envelope was stamped "Addressee has moved."

The address of the writer may be placed at the beginning or the end of the letter, or omitted altogether if well-known to the addressee.

Do you know the addressee?

Person is a grammatical property which is overtly manifested in so-called Personal Pronouns: forms which include the speaker (I/we) are said to be ‘first personʼ Pronouns; forms which include the addressee (you) and not the speaker are said to be ‘second personʼ Pronouns; while forms which exclude both speaker and addressee (he/she/it/they) are ‘third personʼ Pronouns.