Otello - english version
How to get the Customs E-Stamp on your Tax Free Invoice
Verify the correctness of the passport number and the OTELLO request code displayed on your Tax Free invoice after shopping at a national seller.
Show your passport and your Tax Free invoice at the national exit point (airport, port, etc.) when you are leaving Italy.
Check the status of the Customs E-Stamp after performing Customs Control formalities through OTELLO.