People generally agree that using the bc option is appropriate for privacy reasons. For example, perhaps you are an attorney, and you email an insurance company a copy of a client's claim. You might bc the client to ensure the client knows you sent the document and to keep his or her email address private from the insurance company.

As memos or emails, you will want to start by putting the documents in the correct format. For a memo, you will open up a word processing program, such as Microsoft Word, and you will type the memo header at the top of the document: to, from, subject, and date.

Have empathy, be polite, and offer to assist with other questions or requests.