Question on unique codes

I am going to be selling an item in gift stores, and the item is tied to one of my songs. I would like to give a free download of the song with each item purchased, so there must be a card/label etc with a unique download code in the item. The buyer will go to my site and enter the code (and their email for future contact) and then they will get 1 download that will expire after that. I guess they could leave their email and the code and we could email back a download link but that would require someone at my end to do something work – I’d like to keep it automatic.

Is this something your plugin can do?
Thanks
TedT