Log in
Then go to "My Account" on the top banner. At the bottom of the "My Account" page you will see "My Recently Sent Cards"
Below that you will see "Show all Cards." Click that.
This will bring up a list of send cards and cards waiting to be sent. In this list you will find the card you are looking for. There are three icons next to the card in question. The third card is a trash symbol. Click there to stop the delivery.
If you wish to edit the message you wrote with the card you will have to cancel the card and return to the "send later" process with a new message.
