Card lookup
Every card has a number.
It's written on the right of the web address.
If one arrived in your mail — type the number to see the card and leave a note if you want to. If you sent one — type in the number you kept. You can check back whenever you like, or leave your email and I will tell you if a message comes in.
No card with that number. It is three digits, on the right of the web address.