That's not a reliable form of copyright unfortunately as there is no independent evidence that the contents of the envelope have not been tampered with or exchanged, even if sent recorded delivery. It's not recommended as a means of copyrighting materials.
That's not a reliable form of copyright unfortunately as there is no independent evidence that the contents of the envelope have not been tampered with or exchanged, even if sent recorded delivery. It's not recommended as a means of copyrighting materials.