What is the recipient's address in a business letter commonly referred to as?

The recipient's address in a business letter is referred to as the inside address. This part typically includes the name of the recipient, their title (if applicable), the company name, and the street address, including the city, state, and ZIP code. The inside address is crucial as it provides the necessary information for the letter to reach the intended recipient, and it is positioned above the salutation in the letter.

This format helps ensure that the correspondence is professionally presented and facilitates clear communication. The other options, while also related to letter writing, do not refer to the recipient's address specifically. For example, the salutation addresses the recipient directly, the enclosure mentions attachments included with the letter, and the postscript is a note added at the end after the signature, none of which pertain to the address itself.