Copyright via registered mail

If you are the author of a book, the developer of a software program or the owner of any other intellectual work, you can protect you intellectual property rights by simply mailing your work to yourself via registered mail.

You should never open the envelope unless there is a dispute over the ownership of the work. In that case, the date on the envelope will prove that you are the legal owner!

At least this is recommended by several Greek attorneys and the National Library of Greece.