There's no way to pull the data out of the image, even if it is a raw scan, wouldn't there be some OCR function that exists? Honestly I'm a bit surprised there's nothing that has solved this problem.
You would need a template for each customer on where in the file the data exists. Error checking would be an issue but you could bypass that a bit by using the same information and generating a receipt to the user. You could also have filters in place that would require a human to intervene if the amounts are too high case something goes wrong.
I get that you're not asking for an app idea or anything but I'm surprised there's not some solution you can use that already exists.
You would need a template for each customer on where in the file the data exists. Error checking would be an issue but you could bypass that a bit by using the same information and generating a receipt to the user. You could also have filters in place that would require a human to intervene if the amounts are too high case something goes wrong.
I get that you're not asking for an app idea or anything but I'm surprised there's not some solution you can use that already exists.