Just wondering if anyone has tried printing numbers on the receipt from POS to verify that someone signing up for a contest is truely someone who purchased from your store? For example:
When POS goes through the XML file when a receipt is being printed, it creates a random number and sends it to an outside source (e.g. Internet MySQL Server). It then prints the number on the receipt for the customer to use later when verifying they are who they say they are on a web based form.
Does anyone know if this is a possible feat?
I have some experience with the receipt.xml (edited the file before for a custom receipt to come out when a customer returns an item, so we can write down all their personal information) and web based programming knowledge (PHP, MySQL) but no XML knowledge.