KTO describes a mailbox procedure at certain ports without a tax-refund desk or kiosk: obtain customs export confirmation, fill out purchaser and refund-payment details on the voucher, and submit it using the designated refund mailbox. Check availability and instructions with the port and refund provider; do not assume any mailbox will work.

Refund rules and available providers can change. Recheck the official KTO guidance and the participating shop or hotel before purchase.