[sorry if this is the wrong area to post this—please move or remove if necessary.]
Hi everyone! I have a question about voucher codes: I am selling some Vienna vouchers online, which I bought last winter during the 4-for-3 sale. A potential buyer is asking if there is any way I could prove that the voucher codes are unused. I am new at selling stuff like this online—does anyone have recommendations about how I could prove this to the buyer?
-Jeff
