Body _ The body of the letter should be broken into paragraphs with a line space (don't use indents). Also, keep sentences succinct and paragraphs short. Don't use flowery language. Address only the points you need to put across. Brevity is the key. The body of the letter should be aligned left in both formats _ Closing, Sign_Off And Name
Unlike a typical UK official letter format, the US has a couple of variations, the full block format and modified block format. The former simply means all elements of the letter, from the return address at the top down to the writer's name at the foot, are justified left. the latter, on the other hand, incorporates some elements to the right or centre, rather like the UK official letter format.