From: "Tim" 
Newsgroups: uk.people.silversurfers uk.legal uk.misc uk.finance
Subject: Re: How do I post a letter and later prove that letter was posted?
Date: Fri, 27 Jul 2007 09:59:23 +0100
Bytes: 2389

>>> He quite specifically stated that was NOT sufficient, and
>>> that he actually needs proof of exactly *what* was posted.
>>
> "Theo_Delight@yahoo.co.uk" wrote:
>>Which, when one bothers to think about it, is ridiculously easy
>>to do.  Before one sends the letter by Special Delivery, one
>>takes a xerox copy of the letter first by itself and then with the
>>completed Special Delivery chit overlaying part of the letter.
>>making sure that the tracking number is clearly visible on the copy.
>
"Cynic" wrote
> The number is applied to the envelope.  What's
> to stop the person substituting a different letter
> before handing the envelope across for posting?

Ermm - did you bother to read the bit he wrote which you snipped?
If the letter was substituted, then the counter clerk
wouldn't stamp/sign the copy, now would they!!