I would like to get a list of buyers so I can refund $5 back to my buyers who retweet about my apps, but I need to confirm their identity! Or anyone knows how I can proceed differently?
Either get them to post a comment on email you through your profile page, or you can get their buyer number from the purchase.
It is not easy to know who bought your item unless they contact you using the form on your profile or make a comment on your item. For your situation you can make a big graphic announcement on your item page and your profile, simply saying your message and that they should contact you using the form.
If you have their purchase code you can use the envato API via the following URL: http://marketplace.envato.com/api/edge/YOUR USER NAME/API KEY/verify-purchase:PURCHASE CODE.json Just swap the “YOUR USER NAME”, “API KEY” and enter the “PURCHASE CODE” from the buyer