What statement is true regarding the letters written on letterhead for external distribution?

The statement regarding the requirement for letters written on letterhead for external distribution that is accurate is that they require a stamp or print of letterhead. Using official letterhead is essential for external correspondence as it conveys professionalism and authenticity on behalf of the organization. A letterhead typically includes important information such as the organization’s name, address, phone number, and sometimes a logo, which helps to establish the credibility of the correspondence and ensures that the recipient recognizes the source.

In formal communication practices, letterhead serves as a visual representation of the organization's identity, reinforcing the professionalism of the document. When letters are distributed to parties outside the organization, using letterhead helps to present an official image and can signify that the information contained within carries weight and authority.

While it's correct that letters can be unsigned under certain circumstances, this does not apply universally as formal correspondence typically requires a signature to validate the content. Additionally, internal procedures usually dictate whether a "From" block is required, and while using plain paper may be acceptable in informal contexts, it undermines the professional presentation expected in external communications.