No photocopies will be accepted

I recently got sent an email by a friend for an on-line competition at Borders booksellers. Nothing terribly exciting -- you get sent a unique URL to visit, with a one-in-a-bazillion chance of winning something interesting, and when you lose, they give you a consolation prize: something like "buy three magazines, get 10% discount on the fourth" sort of thing.

The consolation price is supplied as a PDF file. It says:

Only valid on presentation of original voucher, no photocopied vouchers will be accepted.

For the benefit of the lawyers who wrote this thing and are probably scratching their head in puzzlement over why I am pointing this out, I will point out that it is an electronic PDF file. There is no "original voucher" when the user can print out a thousand identical copies. Prohibiting photocopies just makes no sense when the user can just print out another copy.