The stamping fee is the fee you are required to pay at the São Tomé Int airport in order to get the official visa stamped in your passport. The stamp fee must be in cash. It is important to have available the exact amount. Stamp fee at the airport (price per person) •20 Eur for single 1 month Tourist Visa •30 Eur for single 1 month Business Visa •Children under 18 years pay half the value