When you tap I mailed it, you can add what’s in the envelope. Your partner sees it on the swap, on Open mail, and hosts see it on the swap desk. Print pack slips at the table, write the line there, then copy it onto I mailed it at home. It is not the same as a packing note.
- What’s in the envelope — partner-visible (stickers, washi, a note). Skip street addresses.
- Packing notes — private to you on that swap only (reminders, shopping list, postage math).