You would have to prove that the physical business takes place outside of Belize as an IBC is not able to conduct business inside the country as you know. Although it is well known that IBC are designed not to be run from inside the country,︀ a company like TransferWise would need to limit their liability by showing that they have︁ checked that the business is being run from outside the country, the only way they︂ can easily do this is by requiring a utility bill with the registered company name︃ and address outside of Belize being listed.
The registration documents showing your registered address outside︄ of the country is not good enough, neither is a mobile phone bill which is︅ why a 'utility bill' is required. Remember with regulations in finance, money transfers and banking︆ always changing, everyone is looking for a way to plausibly cover their a*s, TransferWise is︇ no different
