Yes, eFax allows users to send multiple documents in a single fax transmission. This is beneficial for those who need to send several related files together without the need to transmit them separately. Typically, users can compile their documents into one file format, such as a PDF, before sending. Many eFax services also permit the addition of various file types, including Word documents and images, within a single fax. Users should be aware of any file size limits that the eFax service may impose when sending multiple documents. It is a good practice to check the eFax website for specific details regarding document size and the types of files that can be included.