First, it is important to understand that MyRegistry.com is not the store that you purchase the item from, but rather the registry that the items are listed on. Through our website, we can direct you to all of the stores that carry the items listed on your friend's registry. Once you are directed to a store, you must complete the purchase transaction on the store’s website.
When you find an item you would like to purchase, click the button to BUY. Clicking to purchase an item will redirect you to the store to complete the order. Upon completing your purchase, you will notice the registry remains open in a separate window asking Did you buy this gift?. By answering "Yes" to this question the item will instantly be marked as received on the registry.