In a modified-block format letter, all text is left aligned (except the author's address, date, and closing), paragraphs are not indented, and the author's address, date, and closing begin at the center point.

Does modified block style include indented paragraphs?

Paragraphs are not indented in the modified-block style. However, the date, closing, and signature block are indented–to begin at the center of the line.

What is the difference between a block style and modified block style letter?

Modified block differs from block style in that the date, sign off, and signature lines begin at the centre point of the page line. The beginning of each paragraph is indented five spaces, along with the subject line, if used.