In this case, they are circumspect rather than getting right to the point. Letters can also be written with the purpose to persuade or convince the reader and may not have direct organizational patterns. In this case, they are circumspect, also.
Letters have a unique format.
The main text always single-spaced. Each paragraph is not indented but begins at the left margin. Double-space between the paragraphs. This letter type is slightly different from the first. The date, the closing, your signature, and your title are all lined up along the center of the letter.