Which document type is commonly used to communicate with all stakeholders involved in a legal matter?

The correct answer is document request because this type of document serves to formally ask for evidence, documents, or other information from various stakeholders involved in a legal matter. A document request is an essential part of the discovery process in litigation and is designed to ensure that all parties have access to the information they need to build their case and respond appropriately. This communication fosters transparency and provides a structured way for all stakeholders—including clients, attorneys, and opposing parties—to understand what is being requested and to comply with those requests efficiently.

In contrast, the other options are more specialized types of documents that may not effectively communicate with all stakeholders. An affidavit is a sworn statement of fact, usually submitted to support a particular motion or claim. A brief is a legal document presented to a court that outlines the arguments, facts, and legal reasons for a particular position, typically directed at the judge and not all stakeholders. A motion is a formal request made to the court for a specific ruling or order, often focused on a particular legal issue, rather than facilitating communication among all parties in a legal matter. Thus, while all these documents serve important roles within the legal process, the document request stands out as the primary means of communication with all those involved in litigation.