At work I'm writing a database application that will track users who access a coupon to print out. Is there any way to prevent users from printing out multiple copies of the coupon? I suppose that once the coupon is displayed you really have to hope that they don't print out multiple copies. <br /><br />I can prevent them from accessing the coupon upon subsequent logins, but an elegant way to prevent multiple printings has got me stumped.<br /><br />Is there a feasible way to do this?<br /><br />BTW I will not have a link directly to the coupon image (PNG) file, but will open a new window and use the PHP header() function to write out the coupon to prevent anyone from linking or accessing the coupon via URL.
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