Discount Codes for Extended Period of Time

Hi,

I was asked to join a bundled promotion for next month with a group of vendors from various sites.  The people who purchase the promo must have access to my offer for a full year.  This means I would need to create a 100% discount code.  Since my offer is a PDF, I've got no control over who uses the code.  Does anyone have a work around for something like this?

Thank you!

@MyPocketDesigner You could use Member areas and require creation of an account. You can set the fee for the member area to Free so that may work. It will cost you to have a members area though.