How To Write An Address On 3 Lines Application . On the first line, you’ll put the recipient’s name. So every line will be separately. How To Write A Letter To Company Request Something scrumps from scrumpscupcakes.com House/flat no, building name, street name/number. Then, your entire street number, apartment address, and apartment number go on the second line. Usps abbreviations are used for both the street address and state, and there is no punctuation in the lines for the street address or city, state and zip code.