Coins are the currency used on the site for you to choose which premium content you'd like to pay for. We have hundreds of card designs that are completely free to send, and hundreds that cost Coins. Additionally, adding premium elements to free or paid cards will add a coin cost to your mailing. Premium options include: envelopes, liners, stamps, logos, and backdrops. The current cost of your card per recipient will always appear at the top right corner of your Customize page when you're creating your card.
You do not always need Coins, since you have the option to choose a free card design and remove any custom options that require Coins.
* Coins CANNOT be used to purchase PAPER.