Definition - What does Amended Complaint mean?
An amended complaint is information added to an original complaint after its already been filed. As with other court rules on amendments, an amended complaint must be filed before a response is issued. Otherwise, it would not be fair or in line with court process. An amendment to a complaint can be any material fact that was excluded at the original filing date.
Justipedia explains Amended Complaint
An amended complaint is usually a better developed claim than the original. It takes into consideration all of the factors that could possibly exist in a complainant's viewpoint. It usually clarifies an existing matter rather than adds another fact to it, but it can do either.