For example, write “Attn: John Smith,” where “John Smith” is replaced with your recipient’s name. As an alternative, you can write out the full word “attention. “[2] X Research source

If the company is large and the person to whom you’re writing works for a particular department, include the department name on a line of it’s own before you write the company name. Not including the company name on the envelope will not usually prevent your letter from being delivered. However, your letter will look less professional, and may not get delivered promptly if you don’t include the company name.

Make sure you know the exact street address where your recipient works. Many businesses that are located in multi-story or other large buildings will include a suite number in their address. Including this number is crucial.