Write the name of the person to whom the letter is addressed prior to writing the rest of the address.
Enter c/o and the name of the third party on the line below. For example, if you wanted to reach John, write "John" on the first line, followed by "c/o Paul" on the second line.
Write the rest of the address as normal, so the finished product would have "John" on the first line, "c/o Paul" on the second and then the street address, city, state and zip code on the last line.