Addressing a business envelope correctly helps ensure that your letter gets to its intended recipient quickly. It's important to follow standard practices for addressing correspondence, particularly if you are sending a letter to a large company with many departments. Failing to include complete information might mean that it will take longer than necessary for the envelope to reach the correct person or department. If you use the same format for every business envelope, addressing envelopes will soon become second nature.
Use the ZIP+4 code if you know it. The ZiP+4 code contains the usual five-digit ZIP code followed by a hyphen and four additional numbers. The additional numbers makes it easier for the Postal Service to locate the recipient.
Legibility is important. Use black ink and avoid fonts that are hard to read.