Basically DH and I do not have a credit card (financial problems in the past means we are unlikely to be accepted and, TBH we are probably safest without one)
We are hoping to holiday in Europe this year and would like to hire a car, a near impossibility without a credit card. My research throws up prepaid MasterCards, some labelled as debit, some as credit cards. This is where everything gets a bit vague 
EuropCar tell me that they cannot accept a card without raised numbers as they take an imprint- fair enough, we will look for one with raised numbers. They cannot say for certain whether that will be sufficient though.
The holiday firm insists that this will not be acceptable, despite the promise that the card is accepted everywhere the MasterCard symbol is displayed.
I may be a natural risk taker, but even I balk at the idea of flying hundreds of miles, to be told at the airport we will be refused a car