Dear the shop owner,
Hello. I'm Chisako Seidel a Japanese postcrossor who ordered cards (#1007) at your store. I picked up the parcel from the post office this evening and I'm really pleased with all these beautiful postcards in good quality!
Thank you so much for the extra cards as well!
Now I'm even more excited to send out cards through postcrossing.
When I need more cards in the near future, I'll definitely come back to your store!