@Coin twitter confirmed that the coin card actually does have a signature field on the back that you would sign, so the vendor can use that to compare with your

@Coin twitter confirmed that the coin card actually does have a signature field on the back that you would sign, so the vendor can use that to compare with your receipt. https://twitter.com/coin/statuses/401939329506746368 https://twitter.com/coin/statuses/401939329506746368