Collecting Stamps
- What are "Stamps", and how can I obtain them?
- How can I gift a stamp to a friend?
- Will I receive a stamp from Time Machine or World Explorer that I already have in my collection?
- There is a blank image in my stamp collection. How can I resolve this issue?
- I received a new stamp from my friend, but I can't use it in my letter. Why is that?
- Can I use a stamp more than once?
- What are the differences between "My Stamps" and "Stamp Collection"?