In some embodiments, the instant invention provides for a computer-implemented method that includes at least the following steps of: periodically receiving investment transactional data identifying investment transactions of a plurality of investors; automatically determining, based on the investment transactional data, a document to be mailed to each investor of the plurality of investors; automatically generating a delivery data for each mailing to be mailed to each investor of the plurality of investors, where the delivery data includes: bucslip data or trade confirmation data, assembling data, and unique production control bar code data generated based on the assembling data and an investment transaction identifier from the investment transactional data; and printing a unique production control bar code based on the unique production control bar code data, where the unique production control bar code is configured to be used for: assembling each mailing envelope, and tracking such mailing envelope.