Registered post here makes the postal service liable.  If they register it, that makes it their responsibility, so they make sure it's sealed.  They don't register it until the examined contents are sealed within.  Anything sent by registered mail is given a permanent unique ID number, and the records of the post office will suffice in court as evidence of when the item was posted.

I notice that USA government website contains information about registering work so it's copyrighted.  That's weird, since your work is automatically copyrighted anyway under international law (which the USA has ratified).  I guess the purpose is to provide others with a common database to search, rather than to actually copyright anything.

Article 10
Certain Free Uses of Works:
1. Quotations; 2. Illustrations for teaching; 3. Indication of source and author

(1) It shall be permissible to make quotations from a work which has already been lawfully made available to the public, provided that their making is compatible with fair practice, and their extent does not exceed that justified by the purpose, including quotations from newspaper articles and periodicals in the form of press summaries.

(2) It shall be a matter for legislation in the countries of the Union, and for special agreements existing or to be concluded between them, to permit the utilization, to the extent justified by the purpose, of literary or artistic works by way of illustration in publications, broadcasts or sound or visual recordings for teaching, provided such utilization is compatible with fair practice.

(3) Where use is made of works in accordance with the preceding paragraphs of this Article, mention shall be made of the source, and of the name of the author if it appears thereon.

http://www.wipo.int/treaties/en/ip/berne/trtdocs_wo001.html#P144_26032

Most of our nations have signed the Bern Convention.

That seems like a really cool idea to me.

Naturally Speaking is the one used at my university.

I've just written a truly disgusting scene.  Vomit-worthy.

ZOMG? WTF?!  LOLz!!111  tHeN wE cAn AlL dO tHiS!

And punctuation.