Cover Letter Whenever a job seeker contacts an employer, his or her resume should always be accompanied by a cover letter. A well written cover letter should give employers an insight into the job seeker's personality and entice them to read their CV. Uninvited Cover Letter - This is the type of cover letter most often used and should be sent to employers who are not advertising. Job seekers using this kind of cover letter are hoping to uncover positions within the hidden market. Invited Cover Letter - This kind of cover letter is sent in response to a job advertisement. Employers who have announced job openings expect - and will welcome - such cover letters. Referral Cover Letter - As the name suggest, this kind of cover letter is sent when a person who knows the employer personally refers the job seeker for a position. It's always important to 'name-drop' early on in the cover letter in order to catch the employers attention and compel him to read the CV.