I have a web-site on which users can print vouchers and delivery-labels (with which they pay for parcel-services).
My PROBLEM is:
How can I prevent users from printing one formular (or voucher) more than one time?
The forms have certain series-numbers and if someone would print a form with one number several times,
s/he would only have to pay once to the parcel-service, which our client doesn't like too much, i.e. wants us to prohibit.
If not- we're going to have to cancel contracts, for which I have invested lots of time and my boss his money....
So far I have been using the JavaScript-function print() for printing because it was the easiest way
In the window (which opens the browser) you use for printing it is possible to choose the number of copies you want to print = not good...
Is it possible to set the number of possible copies fix? or do you have/know a possibility to print out online-forms
without having to open this certain window?
I'm looking (desperately) for a way to at least prevent that users print out several same forms directly from the web-site.
I don't think that I'm the first with this problem.
I would be very grateful for ideas and heeelp.
thank you very much
cmuebro