Reputable car hire booked through travel agent in Basel, Switzerland With Hertz, as usual they take cc details for fuel & excess etc. Used a spare card I only use when travelling, not been used for more than 6 months. Next day check on line, lo the account is showing a new transaction back in Aus, with Virgin Mobile who I have never used or dealt with.
Tried to report online, no go must ring but only gave Aus #. Call and operator took forever, even though I explained I was calling on mobile from Switzerland. Would not call back and only said next time use rev charges & gave that #.
Call cost half the transaction. Before they sorted, there were 3 more from the same Virgin Mobile source. Finally sorted in my favour after 3 month investigation. Problem was I has used card for other transactions that had not been processed, so if card cancelled when problem identified it would have meant entire trip would have been spent on phone to banks!