问题：
请用英文回答：What are the components of a signature?
答案：
It is common to type the name of the writer’sfirm or company immediately below complimentary close. Then the person whodictates the letter should sign his name, by hand and in ink, below it. Sincehand-written signatures are illegible, the name of the signer is usually typedbelow the signature, and followed by his job title or position.