"Brian Morrison" wrote in message
...
Michael Hoffman wrote:

Yes, I can. Ensure that the same bar code cannot be printed more than
once by doing the printing from inside a custom application in Java or
possibly something that is downloaded and installed?

And this will stop them from using a driver that prints to a file that
can be repeatedly printed? Or photocopied?

Perhaps not, but that takes more effort to do that simply clicking print
again.

I just think that the whole shebang needed more thought, after all the
do mention unique bar codes, implying that only one of each can be
printed. If it ain't so then they are not being truthful.

Shirly all you need to do today to get the same effect is to post things
without stamps on.

A computer that stops stamps being repeatly printed does not stop attempted
fraud, it makes the user pay for valid mistakes.

The risk is in the algorytham being worked out and items being posted using
'stamps' that had been purchased but not used yet, but I expect the cost of
doing this would be to high to make it a worthwhile fraud unless bulk
mailing, and then there would be a large number of hits in one batch (you
couln't be sure to beat the post at the real end all the time) probebly
enough to make the PO invistage the batch and work out what you were doing.

And in response to your other post, you already have one of those
everlasting books of stamps, 6 stamps which are valid and an infinate number
of 'not stamps' which you can 'not peel' and 'not stick' to you envolopes
leaving them with 'no postage'.