A postscript is an afterthought that has occurred after the letter has been written and signed. It may be a sentence, a paragraph, or occasionally many paragraphs added, after the signature of a letter or after the main body of a letter.
The postscript is usually hastily written and thus, may not be properly drafted. Also, it gives the reader the impression that the thoughts of the sender are not clear and he is not systematic.
Hence, the following statement is true.