A bill of particulars is a document that lays out, in detail, the exact claims that are being made against a defendant.
Bills of particulars can be used in either civil or criminal cases.
Generally, bills of particulars are created at the request of the defendant so that they can better understand the nature of the accusations and adequately create a defense. Bills of particulars are usually created by either the plaintiff or their attorney.
The content of the bills of particulars typically makes up the focus of the trial. It is the responsibility of the plaintiff to try to prove that the accusations in the bill of particulars are in fact true.