If in doubt, use the full block. It's simpler and seen as a wholly acceptable format for all official letters, largely because it is the more formal_looking of the two. Sender's Address _ The address of the sender will be the first thing to appear on the letter. As you can see in the examples above, its positioning differs depending on the format: Full block format (or FBF for the purposes of this article): Align left. Modified block format (or MBF): Align right
Imagine that you are the hiring manager for the company at which you are applying. You might receive a minimum of 10┰ resumes and cover letters on the first few days of posting the job. Then, on the next few days if you happen to see a follow_up cover letter from an applicant saying how impressed they are with the company and would absolutely love an interview, you probably are going to take note and look at their credentials even further. Now let's go back to setting up your follow up cover letter format: First, place a small opening paragraph at the beginning of the page expressing that you are "following up," and that you are still interested in gaining an interview. That's it! Utilizing a second cover letter will literally double your chances at gaining the interview.