This should answer your question.
http://community.revolut.com/t/return-top-up-for-existing-customers-outside-of-eu-but-in-europe/537/2?u=julien
This should answer your question.
http://community.revolut.com/t/return-top-up-for-existing-customers-outside-of-eu-but-in-europe/537/2?u=julien