How to Write a Letter and Address an Envelope in New Zealand

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6021 is the postal code for Wellington, Wellington. That four-digit number is not just a formality — it tells NZ Post exactly where to route your mail.

Why the Postal Code Position Matters for Sorting

New Zealand postal codes have four digits. They appear on the line immediately after the locality (town or city) and before the country name. Putting the postal code in the right spot helps NZ Post’s sorting machines read it fast. A misplaced code can delay delivery or even send your letter to the wrong depot. For mail sent from overseas, the country line “NEW ZEALAND” must be in capitals on its own line below the code.

The Correct Address Layout

Write the address from top to bottom, one element per line. Start with the recipient’s name, then the street name and house number on the next line. On line three goes the locality — for example, Wellington. Line four holds the four-digit postal code: 6021. If the letter comes from outside New Zealand, add a fifth line with “NEW ZEALAND” in capital letters. That is the full layout this site uses for New Zealand addresses. For a visual guide, see the official NZ Post addressing guide.

Step-by-Step: Writing and Sending a Letter

  1. Find the correct postal code. Use the Postcodes.nz postal code search to look up the recipient’s code. Enter the locality name and get the precise four-digit number.
  2. Write the letter. Start with the date and place at the top. Open with a greeting, then a clear first sentence stating the purpose. Write the body, close with a polite formula, and sign your name. Print your name below the signature.
  3. Address the envelope. Write the recipient’s address in the centre using the layout above. Place your own sender address in the top-left corner (or on the back flap).
  4. Check the length. Keep your letter concise. Use a word and character counter to ensure it fits on one page if needed. Count words and characters to stay within a reasonable length.
  5. Translate if necessary. If you are writing to someone in another language, or receiving a letter from overseas, use an AI translator to help with the wording. Then edit the result yourself so it sounds natural.
  6. Double-check the address. Verify that the postal code matches the locality. A wrong code can misroute your mail.
  7. Post the letter. Attach the correct postage and drop it into a postbox or take it to a NZ Post shop. Follow the official NZ Post addressing guide for any further detail on envelope layout.

Tools for Drafting and Length

Writing a good letter starts with a clear structure. If you feel stuck, you can draft the letter with AI and then edit it yourself. This saves time and helps you organise your thoughts. After drafting, check the document length. A word and character counter tells you exactly how many words and characters you have used. That way you avoid going over a page or falling short of the necessary detail. For international correspondence, the Universal Postal Union sets the global standards for addressing mail across borders. Their rules ensure your letter reaches any country in the world.

Common Mistakes to Avoid

  • Putting the postal code on the same line as the locality. It belongs on its own line below the town or city name.
  • Omitting the postal code entirely. Every New Zealand address needs a four-digit code.
  • Using the wrong code for the locality. Always verify with the Postcodes.nz postal code search before writing the envelope.
  • Forgetting the country line on overseas mail. Write “NEW ZEALAND” in capital letters on the last line.
  • Writing the sender address in the centre. The centre is for the recipient; put your address in the top-left corner or on the back.

By following this layout and using the tools linked above, you can write a clear letter and address the envelope correctly every time.