The usual way of using copyright is to license it to someone. Without a licence, only the author can copy or use the work. For example, if is a book, no one else is allowed to copy it. Typically, an author will license the book to a publisher in exchange for a fixed sum, or a percentage of the book's sales. Licences can be written in a huge number of different ways.
Moral rights are a European idea.
Please send a covering letter at the same time explaining what the contents are. In case there is any dispute as to your intellectual property, each of the parcels can be opened to demonstrate that you had originated the idea, at least at the time of posting. Although there is no requirement under UK law for a copyright notice to be placed on published works, it is required in countries which adhere only to the Universal Copyright Convention. The pirate will then find it more difficult to claim that they thought the copyright belonged to someone else who had given them permission to use it. Finally, for computer programs, pirates have frequently been caught out by the inclusion of redundant code in the original work.