Download files/products and serial/code?

Hi

Can anyone help please?

I've got a site with one product which is a downloadable file, an invitation. Is there a way of making the downloads unique, for example, adding a unique number/code automatically for each download? I need something like this to stop people from copying and sharing the file (Invite).

Any help will be appreciated.

Many thanks.

Hi,

You should have a look at HikaSerial:
www.hikashop.com/fr/hikashop/hikaserial.html