Modified Semi-block format Formal letter format by Expert Writer - February 8, 2016February 7, 20200 In a modified semi-block format letter, all text is aligned to the left side of the paper. Exception is being made only on the following: – sender’s address, – date – closing line In this letter format, all paragraphs are indented, and the author’s address, date, and closing are usually indented in same position. Have a look at the picture provided below.